[PATCH 3/3] stm32mp1: ram: remove tuning support
Patrice CHOTARD
patrice.chotard at foss.st.com
Mon Nov 22 08:51:00 CET 2021
Hi Patrick
On 11/15/21 3:32 PM, Patrick Delaunay wrote:
> Remove the DDR interactive command tuning, as the support of a predefined
> DDR PHY tuning is removed for STM32MP1 driver in SPL and in TF-A
> and the result of this tuning will be never used.
>
> Moreover this SW tuning procedure can failed on some hardware
> configuration (to many BIST errors and no convergence); it will be no
> more supported in the next delivery of the DDR utilities included in
> the CubeMX tool of STMicroelectronics.
>
> Signed-off-by: Patrick Delaunay <patrick.delaunay at foss.st.com>
> ---
>
> drivers/ram/stm32mp1/Makefile | 1 -
> drivers/ram/stm32mp1/stm32mp1_ddr.c | 8 +-
> drivers/ram/stm32mp1/stm32mp1_ddr.h | 5 -
> drivers/ram/stm32mp1/stm32mp1_ddr_regs.h | 64 +-
> drivers/ram/stm32mp1/stm32mp1_interactive.c | 22 +-
> drivers/ram/stm32mp1/stm32mp1_tests.h | 3 -
> drivers/ram/stm32mp1/stm32mp1_tuning.c | 1540 -------------------
> 7 files changed, 7 insertions(+), 1636 deletions(-)
> delete mode 100644 drivers/ram/stm32mp1/stm32mp1_tuning.c
>
> diff --git a/drivers/ram/stm32mp1/Makefile b/drivers/ram/stm32mp1/Makefile
> index e1e9135603..71ded6bed4 100644
> --- a/drivers/ram/stm32mp1/Makefile
> +++ b/drivers/ram/stm32mp1/Makefile
> @@ -8,7 +8,6 @@ obj-y += stm32mp1_ddr.o
>
> obj-$(CONFIG_STM32MP1_DDR_INTERACTIVE) += stm32mp1_interactive.o
> obj-$(CONFIG_STM32MP1_DDR_TESTS) += stm32mp1_tests.o
> -obj-$(CONFIG_STM32MP1_DDR_TUNING) += stm32mp1_tuning.o
>
> ifneq ($(DDR_INTERACTIVE),)
> CFLAGS_stm32mp1_interactive.o += -DCONFIG_STM32MP1_DDR_INTERACTIVE_FORCE=y
> diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr.c b/drivers/ram/stm32mp1/stm32mp1_ddr.c
> index 9d086601a4..4d78aa5cb1 100644
> --- a/drivers/ram/stm32mp1/stm32mp1_ddr.c
> +++ b/drivers/ram/stm32mp1/stm32mp1_ddr.c
> @@ -557,7 +557,7 @@ static void ddrphy_idone_wait(struct stm32mp1_ddrphy *phy)
> (u32)&phy->pgsr, pgsr, ret);
> }
>
> -void stm32mp1_ddrphy_init(struct stm32mp1_ddrphy *phy, u32 pir)
> +static void stm32mp1_ddrphy_init(struct stm32mp1_ddrphy *phy, u32 pir)
> {
> pir |= DDRPHYC_PIR_INIT;
> writel(pir, &phy->pir);
> @@ -626,7 +626,7 @@ static void wait_operating_mode(struct ddr_info *priv, int mode)
> log_debug("[0x%08x] stat = 0x%08x\n", (u32)&priv->ctl->stat, stat);
> }
>
> -void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl)
> +static void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl)
> {
> start_sw_done(ctl);
> /* quasi-dynamic register update*/
> @@ -637,8 +637,8 @@ void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl)
> wait_sw_done_ack(ctl);
> }
>
> -void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
> - u32 rfshctl3, u32 pwrctl)
> +static void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
> + u32 rfshctl3, u32 pwrctl)
> {
> start_sw_done(ctl);
> if (!(rfshctl3 & DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH))
> diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr.h b/drivers/ram/stm32mp1/stm32mp1_ddr.h
> index 3bfcb85a8f..861efff92b 100644
> --- a/drivers/ram/stm32mp1/stm32mp1_ddr.h
> +++ b/drivers/ram/stm32mp1/stm32mp1_ddr.h
> @@ -157,11 +157,6 @@ struct stm32mp1_ddr_config {
> };
>
> int stm32mp1_ddr_clk_enable(struct ddr_info *priv, u32 mem_speed);
> -void stm32mp1_ddrphy_init(struct stm32mp1_ddrphy *phy, u32 pir);
> -void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl);
> -void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
> - u32 rfshctl3,
> - u32 pwrctl);
>
> void stm32mp1_ddr_init(
> struct ddr_info *priv,
> diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h b/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h
> index ada3087328..be89d81018 100644
> --- a/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h
> +++ b/drivers/ram/stm32mp1/stm32mp1_ddr_regs.h
> @@ -6,8 +6,9 @@
> #ifndef _RAM_STM32MP1_DDR_REGS_H
> #define _RAM_STM32MP1_DDR_REGS_H
>
> -/* DDR3/LPDDR2/LPDDR3 Controller (DDRCTRL) registers */
> #include <linux/bitops.h>
> +
> +/* DDR3/LPDDR2/LPDDR3 Controller (DDRCTRL) registers */
> struct stm32mp1_ddrctl {
> u32 mstr ; /* 0x0 Master*/
> u32 stat; /* 0x4 Operating Mode Status*/
> @@ -275,25 +276,6 @@ struct stm32mp1_ddrphy {
>
> #define DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN BIT(0)
>
> -#define DDRCTRL_DBG1_DIS_HIF BIT(1)
> -
> -#define DDRCTRL_DBGCAM_WR_DATA_PIPELINE_EMPTY BIT(29)
> -#define DDRCTRL_DBGCAM_RD_DATA_PIPELINE_EMPTY BIT(28)
> -#define DDRCTRL_DBGCAM_DBG_WR_Q_EMPTY BIT(26)
> -#define DDRCTRL_DBGCAM_DBG_LPR_Q_DEPTH GENMASK(12, 8)
> -#define DDRCTRL_DBGCAM_DBG_HPR_Q_DEPTH GENMASK(4, 0)
> -#define DDRCTRL_DBGCAM_DATA_PIPELINE_EMPTY \
> - (DDRCTRL_DBGCAM_WR_DATA_PIPELINE_EMPTY | \
> - DDRCTRL_DBGCAM_RD_DATA_PIPELINE_EMPTY)
> -#define DDRCTRL_DBGCAM_DBG_Q_DEPTH \
> - (DDRCTRL_DBGCAM_DBG_WR_Q_EMPTY | \
> - DDRCTRL_DBGCAM_DBG_LPR_Q_DEPTH | \
> - DDRCTRL_DBGCAM_DBG_HPR_Q_DEPTH)
> -
> -#define DDRCTRL_DBGCMD_RANK0_REFRESH BIT(0)
> -
> -#define DDRCTRL_DBGSTAT_RANK0_REFRESH_BUSY BIT(0)
> -
> #define DDRCTRL_SWCTL_SW_DONE BIT(0)
>
> #define DDRCTRL_SWSTAT_SW_DONE_ACK BIT(0)
> @@ -312,11 +294,6 @@ struct stm32mp1_ddrphy {
> #define DDRPHYC_PIR_RVTRN BIT(8)
> #define DDRPHYC_PIR_ICPC BIT(16)
> #define DDRPHYC_PIR_ZCALBYP BIT(30)
> -#define DDRPHYC_PIR_INITSTEPS_MASK GENMASK(31, 7)
> -
> -#define DDRPHYC_PGCR_DFTCMP BIT(2)
> -#define DDRPHYC_PGCR_PDDISDX BIT(24)
> -#define DDRPHYC_PGCR_RFSHDT_MASK GENMASK(28, 25)
>
> #define DDRPHYC_PGSR_IDONE BIT(0)
> #define DDRPHYC_PGSR_DTERR BIT(5)
> @@ -325,43 +302,6 @@ struct stm32mp1_ddrphy {
> #define DDRPHYC_PGSR_RVERR BIT(8)
> #define DDRPHYC_PGSR_RVEIRR BIT(9)
>
> -#define DDRPHYC_DLLGCR_BPS200 BIT(23)
> -
> -#define DDRPHYC_ACDLLCR_DLLDIS BIT(31)
> -
> -#define DDRPHYC_ZQ0CRN_ZDATA_MASK GENMASK(27, 0)
> -#define DDRPHYC_ZQ0CRN_ZDATA_SHIFT 0
> -#define DDRPHYC_ZQ0CRN_ZDEN BIT(28)
> -
> -#define DDRPHYC_DXNGCR_DXEN BIT(0)
> -
> -#define DDRPHYC_DXNDLLCR_DLLSRST BIT(30)
> -#define DDRPHYC_DXNDLLCR_DLLDIS BIT(31)
> -#define DDRPHYC_DXNDLLCR_SDPHASE_MASK GENMASK(17, 14)
> -#define DDRPHYC_DXNDLLCR_SDPHASE_SHIFT 14
> -
> -#define DDRPHYC_DXNDQTR_DQDLY_SHIFT(bit) (4 * (bit))
> -#define DDRPHYC_DXNDQTR_DQDLY_MASK GENMASK(3, 0)
> -#define DDRPHYC_DXNDQTR_DQDLY_LOW_MASK GENMASK(1, 0)
> -#define DDRPHYC_DXNDQTR_DQDLY_HIGH_MASK GENMASK(3, 2)
> -
> -#define DDRPHYC_DXNDQSTR_DQSDLY_MASK GENMASK(22, 20)
> -#define DDRPHYC_DXNDQSTR_DQSDLY_SHIFT 20
> -#define DDRPHYC_DXNDQSTR_DQSNDLY_MASK GENMASK(25, 23)
> -#define DDRPHYC_DXNDQSTR_DQSNDLY_SHIFT 23
> -#define DDRPHYC_DXNDQSTR_R0DGSL_MASK GENMASK(2, 0)
> -#define DDRPHYC_DXNDQSTR_R0DGSL_SHIFT 0
> -#define DDRPHYC_DXNDQSTR_R0DGPS_MASK GENMASK(13, 12)
> -#define DDRPHYC_DXNDQSTR_R0DGPS_SHIFT 12
> -
> -#define DDRPHYC_BISTRR_BDXSEL_MASK GENMASK(22, 19)
> -#define DDRPHYC_BISTRR_BDXSEL_SHIFT 19
> -
> -#define DDRPHYC_BISTGSR_BDDONE BIT(0)
> -#define DDRPHYC_BISTGSR_BDXERR BIT(2)
> -
> -#define DDRPHYC_BISTWCSR_DXWCNT_SHIFT 16
> -
> /* PWR registers */
> #define PWR_CR3 0x00C
> #define PWR_CR3_DDRSRDIS BIT(11)
> diff --git a/drivers/ram/stm32mp1/stm32mp1_interactive.c b/drivers/ram/stm32mp1/stm32mp1_interactive.c
> index a667d49cff..f0fe7e61e3 100644
> --- a/drivers/ram/stm32mp1/stm32mp1_interactive.c
> +++ b/drivers/ram/stm32mp1/stm32mp1_interactive.c
> @@ -32,7 +32,6 @@ enum ddr_command {
> DDR_CMD_NEXT,
> DDR_CMD_GO,
> DDR_CMD_TEST,
> - DDR_CMD_TUNING,
> DDR_CMD_UNKNOWN,
> };
>
> @@ -59,9 +58,6 @@ enum ddr_command stm32mp1_get_command(char *cmd, int argc)
> [DDR_CMD_GO] = "go",
> #ifdef CONFIG_STM32MP1_DDR_TESTS
> [DDR_CMD_TEST] = "test",
> -#endif
> -#ifdef CONFIG_STM32MP1_DDR_TUNING
> - [DDR_CMD_TUNING] = "tuning",
> #endif
> };
> /* min and max number of argument */
> @@ -78,9 +74,6 @@ enum ddr_command stm32mp1_get_command(char *cmd, int argc)
> [DDR_CMD_GO] = { 0, 0 },
> #ifdef CONFIG_STM32MP1_DDR_TESTS
> [DDR_CMD_TEST] = { 0, 255 },
> -#endif
> -#ifdef CONFIG_STM32MP1_DDR_TUNING
> - [DDR_CMD_TUNING] = { 0, 255 },
> #endif
> };
> int i;
> @@ -125,9 +118,6 @@ static void stm32mp1_do_usage(void)
> "reset reboots machine\n"
> #ifdef CONFIG_STM32MP1_DDR_TESTS
> "test [help] | <n> [...] lists (with help) or executes test <n>\n"
> -#endif
> -#ifdef CONFIG_STM32MP1_DDR_TUNING
> - "tuning [help] | <n> [...] lists (with help) or execute tuning <n>\n"
> #endif
> "\nwith for [type|reg]:\n"
> " all registers if absent\n"
> @@ -311,7 +301,7 @@ end:
> return step;
> }
>
> -#if defined(CONFIG_STM32MP1_DDR_TESTS) || defined(CONFIG_STM32MP1_DDR_TUNING)
> +#if defined(CONFIG_STM32MP1_DDR_TESTS)
> static const char * const s_result[] = {
> [TEST_PASSED] = "Pass",
> [TEST_FAILED] = "Failed",
> @@ -468,16 +458,6 @@ bool stm32mp1_ddr_interactive(void *priv,
> stm32mp1_ddr_subcmd(priv, argc, argv, test, test_nb);
> break;
> #endif
> -
> -#ifdef CONFIG_STM32MP1_DDR_TUNING
> - case DDR_CMD_TUNING:
> - if (!stm32mp1_check_step(step, STEP_DDR_READY))
> - continue;
> - stm32mp1_ddr_subcmd(priv, argc, argv,
> - tuning, tuning_nb);
> - break;
> -#endif
> -
> default:
> break;
> }
> diff --git a/drivers/ram/stm32mp1/stm32mp1_tests.h b/drivers/ram/stm32mp1/stm32mp1_tests.h
> index 55f5d6d93b..8436780790 100644
> --- a/drivers/ram/stm32mp1/stm32mp1_tests.h
> +++ b/drivers/ram/stm32mp1/stm32mp1_tests.h
> @@ -28,7 +28,4 @@ struct test_desc {
> extern const struct test_desc test[];
> extern const int test_nb;
>
> -extern const struct test_desc tuning[];
> -extern const int tuning_nb;
> -
> #endif
> diff --git a/drivers/ram/stm32mp1/stm32mp1_tuning.c b/drivers/ram/stm32mp1/stm32mp1_tuning.c
> deleted file mode 100644
> index c8cd7c3cea..0000000000
> --- a/drivers/ram/stm32mp1/stm32mp1_tuning.c
> +++ /dev/null
> @@ -1,1540 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
> -/*
> - * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
> - */
> -
> -#define LOG_CATEGORY UCLASS_RAM
> -
> -#include <common.h>
> -#include <console.h>
> -#include <clk.h>
> -#include <log.h>
> -#include <ram.h>
> -#include <rand.h>
> -#include <reset.h>
> -#include <asm/io.h>
> -#include <linux/bitops.h>
> -#include <linux/delay.h>
> -#include <linux/iopoll.h>
> -
> -#include "stm32mp1_ddr_regs.h"
> -#include "stm32mp1_ddr.h"
> -#include "stm32mp1_tests.h"
> -
> -#define MAX_DQS_PHASE_IDX _144deg
> -#define MAX_DQS_UNIT_IDX 7
> -#define MAX_GSL_IDX 5
> -#define MAX_GPS_IDX 3
> -
> -/* Number of bytes used in this SW. ( min 1--> max 4). */
> -#define NUM_BYTES 4
> -
> -enum dqs_phase_enum {
> - _36deg = 0,
> - _54deg = 1,
> - _72deg = 2,
> - _90deg = 3,
> - _108deg = 4,
> - _126deg = 5,
> - _144deg = 6
> -};
> -
> -/* BIST Result struct */
> -struct BIST_result {
> - /* Overall test result:
> - * 0 Fail (any bit failed) ,
> - * 1 Success (All bits success)
> - */
> - bool test_result;
> - /* 1: true, all fail / 0: False, not all bits fail */
> - bool all_bits_fail;
> - bool bit_i_test_result[8]; /* 0 fail / 1 success */
> -};
> -
> -/* a struct that defines tuning parameters of a byte. */
> -struct tuning_position {
> - u8 phase; /* DQS phase */
> - u8 unit; /* DQS unit delay */
> - u32 bits_delay; /* Bits deskew in this byte */
> -};
> -
> -/* 36deg, 54deg, 72deg, 90deg, 108deg, 126deg, 144deg */
> -const u8 dx_dll_phase[7] = {3, 2, 1, 0, 14, 13, 12};
> -
> -static u8 BIST_error_max = 1;
> -static u32 BIST_seed = 0x1234ABCD;
> -
> -static u8 get_nb_bytes(struct stm32mp1_ddrctl *ctl)
> -{
> - u32 data_bus = readl(&ctl->mstr) & DDRCTRL_MSTR_DATA_BUS_WIDTH_MASK;
> - u8 nb_bytes = NUM_BYTES;
> -
> - switch (data_bus) {
> - case DDRCTRL_MSTR_DATA_BUS_WIDTH_HALF:
> - nb_bytes /= 2;
> - break;
> - case DDRCTRL_MSTR_DATA_BUS_WIDTH_QUARTER:
> - nb_bytes /= 4;
> - break;
> - default:
> - break;
> - }
> -
> - return nb_bytes;
> -}
> -
> -static u8 get_nb_bank(struct stm32mp1_ddrctl *ctl)
> -{
> - /* Count bank address bits */
> - u8 bits = 0;
> - u32 reg, val;
> -
> - reg = readl(&ctl->addrmap1);
> - /* addrmap1.addrmap_bank_b1 */
> - val = (reg & GENMASK(5, 0)) >> 0;
> - if (val <= 31)
> - bits++;
> - /* addrmap1.addrmap_bank_b2 */
> - val = (reg & GENMASK(13, 8)) >> 8;
> - if (val <= 31)
> - bits++;
> - /* addrmap1.addrmap_bank_b3 */
> - val = (reg & GENMASK(21, 16)) >> 16;
> - if (val <= 31)
> - bits++;
> -
> - return bits;
> -}
> -
> -static u8 get_nb_col(struct stm32mp1_ddrctl *ctl)
> -{
> - u8 bits;
> - u32 reg, val;
> -
> - /* Count column address bits, start at 2 for b0 and b1 (fixed) */
> - bits = 2;
> -
> - reg = readl(&ctl->addrmap2);
> - /* addrmap2.addrmap_col_b2 */
> - val = (reg & GENMASK(3, 0)) >> 0;
> - if (val <= 7)
> - bits++;
> - /* addrmap2.addrmap_col_b3 */
> - val = (reg & GENMASK(11, 8)) >> 8;
> - if (val <= 7)
> - bits++;
> - /* addrmap2.addrmap_col_b4 */
> - val = (reg & GENMASK(19, 16)) >> 16;
> - if (val <= 7)
> - bits++;
> - /* addrmap2.addrmap_col_b5 */
> - val = (reg & GENMASK(27, 24)) >> 24;
> - if (val <= 7)
> - bits++;
> -
> - reg = readl(&ctl->addrmap3);
> - /* addrmap3.addrmap_col_b6 */
> - val = (reg & GENMASK(3, 0)) >> 0;
> - if (val <= 7)
> - bits++;
> - /* addrmap3.addrmap_col_b7 */
> - val = (reg & GENMASK(11, 8)) >> 8;
> - if (val <= 7)
> - bits++;
> - /* addrmap3.addrmap_col_b8 */
> - val = (reg & GENMASK(19, 16)) >> 16;
> - if (val <= 7)
> - bits++;
> - /* addrmap3.addrmap_col_b9 */
> - val = (reg & GENMASK(27, 24)) >> 24;
> - if (val <= 7)
> - bits++;
> -
> - reg = readl(&ctl->addrmap4);
> - /* addrmap4.addrmap_col_b10 */
> - val = (reg & GENMASK(3, 0)) >> 0;
> - if (val <= 7)
> - bits++;
> - /* addrmap4.addrmap_col_b11 */
> - val = (reg & GENMASK(11, 8)) >> 8;
> - if (val <= 7)
> - bits++;
> -
> - return bits;
> -}
> -
> -static u8 get_nb_row(struct stm32mp1_ddrctl *ctl)
> -{
> - /* Count row address bits */
> - u8 bits = 0;
> - u32 reg, val;
> -
> - reg = readl(&ctl->addrmap5);
> - /* addrmap5.addrmap_row_b0 */
> - val = (reg & GENMASK(3, 0)) >> 0;
> - if (val <= 11)
> - bits++;
> - /* addrmap5.addrmap_row_b1 */
> - val = (reg & GENMASK(11, 8)) >> 8;
> - if (val <= 11)
> - bits++;
> - /* addrmap5.addrmap_row_b2_10 */
> - val = (reg & GENMASK(19, 16)) >> 16;
> - if (val <= 11)
> - bits += 9;
> - else
> - printf("warning: addrmap5.addrmap_row_b2_10 not supported\n");
> - /* addrmap5.addrmap_row_b11 */
> - val = (reg & GENMASK(27, 24)) >> 24;
> - if (val <= 11)
> - bits++;
> -
> - reg = readl(&ctl->addrmap6);
> - /* addrmap6.addrmap_row_b12 */
> - val = (reg & GENMASK(3, 0)) >> 0;
> - if (val <= 7)
> - bits++;
> - /* addrmap6.addrmap_row_b13 */
> - val = (reg & GENMASK(11, 8)) >> 8;
> - if (val <= 7)
> - bits++;
> - /* addrmap6.addrmap_row_b14 */
> - val = (reg & GENMASK(19, 16)) >> 16;
> - if (val <= 7)
> - bits++;
> - /* addrmap6.addrmap_row_b15 */
> - val = (reg & GENMASK(27, 24)) >> 24;
> - if (val <= 7)
> - bits++;
> -
> - return bits;
> -}
> -
> -static void itm_soft_reset(struct stm32mp1_ddrphy *phy)
> -{
> - stm32mp1_ddrphy_init(phy, DDRPHYC_PIR_ITMSRST);
> -}
> -
> -/* Read DQ unit delay register and provides the retrieved value for DQS
> - * We are assuming that we have the same delay when clocking
> - * by DQS and when clocking by DQSN
> - */
> -static u8 DQ_unit_index(struct stm32mp1_ddrphy *phy, u8 byte, u8 bit)
> -{
> - u32 index;
> - u32 addr = DXNDQTR(phy, byte);
> -
> - /* We are assuming that we have the same delay when clocking by DQS
> - * and when clocking by DQSN : use only the low bits
> - */
> - index = (readl(addr) >> DDRPHYC_DXNDQTR_DQDLY_SHIFT(bit))
> - & DDRPHYC_DXNDQTR_DQDLY_LOW_MASK;
> -
> - log_debug("[%x]: %x => DQ unit index = %x\n", addr, readl(addr), index);
> -
> - return index;
> -}
> -
> -/* Sets the DQS phase delay for a byte lane.
> - *phase delay is specified by giving the index of the desired delay
> - * in the dx_dll_phase array.
> - */
> -static void DQS_phase_delay(struct stm32mp1_ddrphy *phy, u8 byte, u8 phase_idx)
> -{
> - u8 sdphase_val = 0;
> -
> - /* Write DXNDLLCR.SDPHASE = dx_dll_phase(phase_index); */
> - sdphase_val = dx_dll_phase[phase_idx];
> - clrsetbits_le32(DXNDLLCR(phy, byte),
> - DDRPHYC_DXNDLLCR_SDPHASE_MASK,
> - sdphase_val << DDRPHYC_DXNDLLCR_SDPHASE_SHIFT);
> -}
> -
> -/* Sets the DQS unit delay for a byte lane.
> - * unit delay is specified by giving the index of the desired delay
> - * for dgsdly and dqsndly (same value).
> - */
> -static void DQS_unit_delay(struct stm32mp1_ddrphy *phy,
> - u8 byte, u8 unit_dly_idx)
> -{
> - /* Write the same value in DXNDQSTR.DQSDLY and DXNDQSTR.DQSNDLY */
> - clrsetbits_le32(DXNDQSTR(phy, byte),
> - DDRPHYC_DXNDQSTR_DQSDLY_MASK |
> - DDRPHYC_DXNDQSTR_DQSNDLY_MASK,
> - (unit_dly_idx << DDRPHYC_DXNDQSTR_DQSDLY_SHIFT) |
> - (unit_dly_idx << DDRPHYC_DXNDQSTR_DQSNDLY_SHIFT));
> -
> - /* After changing this value, an ITM soft reset (PIR.ITMSRST=1,
> - * plus PIR.INIT=1) must be issued.
> - */
> - stm32mp1_ddrphy_init(phy, DDRPHYC_PIR_ITMSRST);
> -}
> -
> -/* Sets the DQ unit delay for a bit line in particular byte lane.
> - * unit delay is specified by giving the desired delay
> - */
> -static void set_DQ_unit_delay(struct stm32mp1_ddrphy *phy,
> - u8 byte, u8 bit,
> - u8 dq_delay_index)
> -{
> - u8 dq_bit_delay_val = dq_delay_index | (dq_delay_index << 2);
> -
> - /* same value on delay for clock DQ an DQS_b */
> - clrsetbits_le32(DXNDQTR(phy, byte),
> - DDRPHYC_DXNDQTR_DQDLY_MASK
> - << DDRPHYC_DXNDQTR_DQDLY_SHIFT(bit),
> - dq_bit_delay_val << DDRPHYC_DXNDQTR_DQDLY_SHIFT(bit));
> -}
> -
> -static void set_r0dgsl_delay(struct stm32mp1_ddrphy *phy,
> - u8 byte, u8 r0dgsl_idx)
> -{
> - clrsetbits_le32(DXNDQSTR(phy, byte),
> - DDRPHYC_DXNDQSTR_R0DGSL_MASK,
> - r0dgsl_idx << DDRPHYC_DXNDQSTR_R0DGSL_SHIFT);
> -}
> -
> -static void set_r0dgps_delay(struct stm32mp1_ddrphy *phy,
> - u8 byte, u8 r0dgps_idx)
> -{
> - clrsetbits_le32(DXNDQSTR(phy, byte),
> - DDRPHYC_DXNDQSTR_R0DGPS_MASK,
> - r0dgps_idx << DDRPHYC_DXNDQSTR_R0DGPS_SHIFT);
> -}
> -
> -/* Basic BIST configuration for data lane tests. */
> -static void config_BIST(struct stm32mp1_ddrctl *ctl,
> - struct stm32mp1_ddrphy *phy)
> -{
> - u8 nb_bank = get_nb_bank(ctl);
> - u8 nb_row = get_nb_row(ctl);
> - u8 nb_col = get_nb_col(ctl);
> -
> - /* Selects the SDRAM bank address to be used during BIST. */
> - u32 bbank = 0;
> - /* Selects the SDRAM row address to be used during BIST. */
> - u32 brow = 0;
> - /* Selects the SDRAM column address to be used during BIST. */
> - u32 bcol = 0;
> - /* Selects the value by which the SDRAM address is incremented
> - * for each write/read access.
> - */
> - u32 bainc = 0x00000008;
> - /* Specifies the maximum SDRAM rank to be used during BIST.
> - * The default value is set to maximum ranks minus 1.
> - * must be 0 with single rank
> - */
> - u32 bmrank = 0;
> - /* Selects the SDRAM rank to be used during BIST.
> - * must be 0 with single rank
> - */
> - u32 brank = 0;
> -
> - /* Specifies the maximum SDRAM bank address to be used during
> - * BIST before the address & increments to the next rank.
> - */
> - u32 bmbank = (1 << nb_bank) - 1;
> - /* Specifies the maximum SDRAM row address to be used during
> - * BIST before the address & increments to the next bank.
> - */
> - u32 bmrow = (1 << nb_row) - 1;
> - /* Specifies the maximum SDRAM column address to be used during
> - * BIST before the address & increments to the next row.
> - */
> - u32 bmcol = (1 << nb_col) - 1;
> -
> - u32 bmode_conf = 0x00000001; /* DRam mode */
> - u32 bdxen_conf = 0x00000001; /* BIST on Data byte */
> - u32 bdpat_conf = 0x00000002; /* Select LFSR pattern */
> -
> - /*Setup BIST for DRAM mode, and LFSR-random data pattern.*/
> - /*Write BISTRR.BMODE = 1?b1;*/
> - /*Write BISTRR.BDXEN = 1?b1;*/
> - /*Write BISTRR.BDPAT = 2?b10;*/
> -
> - /* reset BIST */
> - writel(0x3, &phy->bistrr);
> -
> - writel((bmode_conf << 3) | (bdxen_conf << 14) | (bdpat_conf << 17),
> - &phy->bistrr);
> -
> - /*Setup BIST Word Count*/
> - /*Write BISTWCR.BWCNT = 16?b0008;*/
> - writel(0x00000200, &phy->bistwcr); /* A multiple of BL/2 */
> -
> - writel(bcol | (brow << 12) | (bbank << 28), &phy->bistar0);
> - writel(brank | (bmrank << 2) | (bainc << 4), &phy->bistar1);
> - writel(bmcol | (bmrow << 12) | (bmbank << 28), &phy->bistar2);
> -}
> -
> -/* Select the Byte lane to be tested by BIST. */
> -static void BIST_datx8_sel(struct stm32mp1_ddrphy *phy, u8 datx8)
> -{
> - clrsetbits_le32(&phy->bistrr,
> - DDRPHYC_BISTRR_BDXSEL_MASK,
> - datx8 << DDRPHYC_BISTRR_BDXSEL_SHIFT);
> -
> - /*(For example, selecting Byte Lane 3, BISTRR.BDXSEL = 4?b0011)*/
> - /* Write BISTRR.BDXSEL = datx8; */
> -}
> -
> -/* Perform BIST Write_Read test on a byte lane and return test result. */
> -static void BIST_test(struct stm32mp1_ddrphy *phy, u8 byte,
> - struct BIST_result *bist)
> -{
> - bool result = true; /* BIST_SUCCESS */
> - u32 cnt = 0;
> - u32 error = 0;
> - u32 val;
> - int ret;
> -
> - bist->test_result = true;
> -
> -run:
> - itm_soft_reset(phy);
> -
> - /*Perform BIST Reset*/
> - /* Write BISTRR.BINST = 3?b011; */
> - clrsetbits_le32(&phy->bistrr,
> - 0x00000007,
> - 0x00000003);
> -
> - /*Re-seed LFSR*/
> - /* Write BISTLSR.SEED = 32'h1234ABCD; */
> - if (BIST_seed)
> - writel(BIST_seed, &phy->bistlsr);
> - else
> - writel(rand(), &phy->bistlsr);
> -
> - /* some delay to reset BIST */
> - udelay(10);
> -
> - /*Perform BIST Run*/
> - clrsetbits_le32(&phy->bistrr,
> - 0x00000007,
> - 0x00000001);
> - /* Write BISTRR.BINST = 3?b001; */
> -
> - /* poll on BISTGSR.BDONE and wait max 1000 us */
> - ret = readl_poll_timeout(&phy->bistgsr, val,
> - val & DDRPHYC_BISTGSR_BDDONE, 1000);
> -
> - if (ret < 0) {
> - printf("warning: BIST timeout\n");
> - result = false; /* BIST_FAIL; */
> - /*Perform BIST Stop */
> - clrsetbits_le32(&phy->bistrr, 0x00000007, 0x00000002);
> - } else {
> - /*Check if received correct number of words*/
> - /* if (Read BISTWCSR.DXWCNT = Read BISTWCR.BWCNT) */
> - if (((readl(&phy->bistwcsr)) >> DDRPHYC_BISTWCSR_DXWCNT_SHIFT)
> - == readl(&phy->bistwcr)) {
> - /*Determine if there is a data comparison error*/
> - /* if (Read BISTGSR.BDXERR = 1?b0) */
> - if (readl(&phy->bistgsr) & DDRPHYC_BISTGSR_BDXERR)
> - result = false; /* BIST_FAIL; */
> - else
> - result = true; /* BIST_SUCCESS; */
> - } else {
> - result = false; /* BIST_FAIL; */
> - }
> - }
> -
> - /* loop while success */
> - cnt++;
> - if (result && cnt != 1000)
> - goto run;
> -
> - if (!result)
> - error++;
> -
> - if (error < BIST_error_max) {
> - if (cnt != 1000)
> - goto run;
> - bist->test_result = true;
> - } else {
> - bist->test_result = false;
> - }
> -}
> -
> -/* After running the deskew algo, this function applies the new DQ delays
> - * by reading them from the array "deskew_delay"and writing in PHY registers.
> - * The bits that are not deskewed parfectly (too much skew on them,
> - * or data eye very wide) are marked in the array deskew_non_converge.
> - */
> -static void apply_deskew_results(struct stm32mp1_ddrphy *phy, u8 byte,
> - u8 deskew_delay[NUM_BYTES][8],
> - u8 deskew_non_converge[NUM_BYTES][8])
> -{
> - u8 bit_i;
> - u8 index;
> -
> - for (bit_i = 0; bit_i < 8; bit_i++) {
> - set_DQ_unit_delay(phy, byte, bit_i, deskew_delay[byte][bit_i]);
> - index = DQ_unit_index(phy, byte, bit_i);
> - log_debug("Byte %d ; bit %d : The new DQ delay (%d) index=%d [delta=%d, 3 is the default]",
> - byte, bit_i, deskew_delay[byte][bit_i],
> - index, index - 3);
> - printf("Byte %d, bit %d, DQ delay = %d",
> - byte, bit_i, deskew_delay[byte][bit_i]);
> - if (deskew_non_converge[byte][bit_i] == 1)
> - log_debug(" - not converged : still more skew");
> - printf("\n");
> - }
> -}
> -
> -/* DQ Bit de-skew algorithm.
> - * Deskews data lines as much as possible.
> - * 1. Add delay to DQS line until finding the failure
> - * (normally a hold time violation)
> - * 2. Reduce DQS line by small steps until finding the very first time
> - * we go back to "Pass" condition.
> - * 3. For each DQ line, Reduce DQ delay until finding the very first failure
> - * (normally a hold time fail)
> - * 4. When all bits are at their first failure delay, we can consider them
> - * aligned.
> - * Handle conrer situation (Can't find Pass-fail, or fail-pass transitions
> - * at any step)
> - * TODO Provide a return Status. Improve doc
> - */
> -static enum test_result bit_deskew(struct stm32mp1_ddrctl *ctl,
> - struct stm32mp1_ddrphy *phy, char *string)
> -{
> - /* New DQ delay value (index), set during Deskew algo */
> - u8 deskew_delay[NUM_BYTES][8];
> - /*If there is still skew on a bit, mark this bit. */
> - u8 deskew_non_converge[NUM_BYTES][8];
> - struct BIST_result result;
> - s8 dqs_unit_delay_index = 0;
> - u8 datx8 = 0;
> - u8 bit_i = 0;
> - s8 phase_idx = 0;
> - s8 bit_i_delay_index = 0;
> - u8 success = 0;
> - struct tuning_position last_right_ok;
> - u8 force_stop = 0;
> - u8 fail_found;
> - u8 error = 0;
> - u8 nb_bytes = get_nb_bytes(ctl);
> - /* u8 last_pass_dqs_unit = 0; */
> -
> - memset(deskew_delay, 0, sizeof(deskew_delay));
> - memset(deskew_non_converge, 0, sizeof(deskew_non_converge));
> -
> - /*Disable DQS Drift Compensation*/
> - clrbits_le32(&phy->pgcr, DDRPHYC_PGCR_DFTCMP);
> - /*Disable all bytes*/
> - /* Disable automatic power down of DLL and IOs when disabling
> - * a byte (To avoid having to add programming and delay
> - * for a DLL re-lock when later re-enabling a disabled Byte Lane)
> - */
> - clrbits_le32(&phy->pgcr, DDRPHYC_PGCR_PDDISDX);
> -
> - /* Disable all data bytes */
> - clrbits_le32(&phy->dx0gcr, DDRPHYC_DXNGCR_DXEN);
> - clrbits_le32(&phy->dx1gcr, DDRPHYC_DXNGCR_DXEN);
> - clrbits_le32(&phy->dx2gcr, DDRPHYC_DXNGCR_DXEN);
> - clrbits_le32(&phy->dx3gcr, DDRPHYC_DXNGCR_DXEN);
> -
> - /* Config the BIST block */
> - config_BIST(ctl, phy);
> - log_debug("BIST Config done.\n");
> -
> - /* Train each byte */
> - for (datx8 = 0; datx8 < nb_bytes; datx8++) {
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d, error=%d",
> - datx8 + 1, nb_bytes, error);
> - return TEST_FAILED;
> - }
> - log_debug("\n======================\n");
> - log_debug("Start deskew byte %d .\n", datx8);
> - log_debug("======================\n");
> - /* Enable Byte (DXNGCR, bit DXEN) */
> - setbits_le32(DXNGCR(phy, datx8), DDRPHYC_DXNGCR_DXEN);
> -
> - /* Select the byte lane for comparison of read data */
> - BIST_datx8_sel(phy, datx8);
> -
> - /* Set all DQDLYn to maximum value. All bits within the byte
> - * will be delayed with DQSTR = 2 instead of max = 3
> - * to avoid inter bits fail influence
> - */
> - writel(0xAAAAAAAA, DXNDQTR(phy, datx8));
> -
> - /* Set the DQS phase delay to 90 DEG (default).
> - * What is defined here is the index of the desired config
> - * in the PHASE array.
> - */
> - phase_idx = _90deg;
> -
> - /* Set DQS unit delay to the max value. */
> - dqs_unit_delay_index = MAX_DQS_UNIT_IDX;
> - DQS_unit_delay(phy, datx8, dqs_unit_delay_index);
> - DQS_phase_delay(phy, datx8, phase_idx);
> -
> - /* Issue a DLL soft reset */
> - clrbits_le32(DXNDLLCR(phy, datx8), DDRPHYC_DXNDLLCR_DLLSRST);
> - setbits_le32(DXNDLLCR(phy, datx8), DDRPHYC_DXNDLLCR_DLLSRST);
> -
> - /* Test this typical init condition */
> - BIST_test(phy, datx8, &result);
> - success = result.test_result;
> -
> - /* If the test pass in this typical condition,
> - * start the algo with it.
> - * Else, look for Pass init condition
> - */
> - if (!success) {
> - log_debug("Fail at init condtion. Let's look for a good init condition.\n");
> - success = 0; /* init */
> - /* Make sure we start with a PASS condition before
> - * looking for a fail condition.
> - * Find the first PASS PHASE condition
> - */
> -
> - /* escape if we find a PASS */
> - log_debug("increase Phase idx\n");
> - while (!success && (phase_idx <= MAX_DQS_PHASE_IDX)) {
> - DQS_phase_delay(phy, datx8, phase_idx);
> - BIST_test(phy, datx8, &result);
> - success = result.test_result;
> - phase_idx++;
> - }
> - /* if ended with success
> - * ==>> Restore the fist success condition
> - */
> - if (success)
> - phase_idx--; /* because it ended with ++ */
> - }
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d, error=%d",
> - datx8 + 1, nb_bytes, error);
> - return TEST_FAILED;
> - }
> - /* We couldn't find a successful condition, its seems
> - * we have hold violation, lets try reduce DQS_unit Delay
> - */
> - if (!success) {
> - /* We couldn't find a successful condition, its seems
> - * we have hold violation, lets try reduce DQS_unit
> - * Delay
> - */
> - log_debug("Still fail. Try decrease DQS Unit delay\n");
> -
> - phase_idx = 0;
> - dqs_unit_delay_index = 0;
> - DQS_phase_delay(phy, datx8, phase_idx);
> -
> - /* escape if we find a PASS */
> - while (!success &&
> - (dqs_unit_delay_index <=
> - MAX_DQS_UNIT_IDX)) {
> - DQS_unit_delay(phy, datx8,
> - dqs_unit_delay_index);
> - BIST_test(phy, datx8, &result);
> - success = result.test_result;
> - dqs_unit_delay_index++;
> - }
> - if (success) {
> - /* Restore the first success condition*/
> - dqs_unit_delay_index--;
> - /* last_pass_dqs_unit = dqs_unit_delay_index;*/
> - DQS_unit_delay(phy, datx8,
> - dqs_unit_delay_index);
> - } else {
> - /* No need to continue,
> - * there is no pass region.
> - */
> - force_stop = 1;
> - }
> - }
> -
> - /* There is an initial PASS condition
> - * Look for the first failing condition by PHASE stepping.
> - * This part of the algo can finish without converging.
> - */
> - if (force_stop) {
> - printf("Result: Failed ");
> - printf("[Cannot Deskew lines, ");
> - printf("there is no PASS region]\n");
> - error++;
> - continue;
> - }
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d, error=%d",
> - datx8 + 1, nb_bytes, error);
> - return TEST_FAILED;
> - }
> -
> - log_debug("there is a pass region for phase idx %d\n",
> - phase_idx);
> - log_debug("Step1: Find the first failing condition\n");
> - /* Look for the first failing condition by PHASE stepping.
> - * This part of the algo can finish without converging.
> - */
> -
> - /* escape if we find a fail (hold time violation)
> - * condition at any bit or if out of delay range.
> - */
> - while (success && (phase_idx <= MAX_DQS_PHASE_IDX)) {
> - DQS_phase_delay(phy, datx8, phase_idx);
> - BIST_test(phy, datx8, &result);
> - success = result.test_result;
> - phase_idx++;
> - }
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d, error=%d",
> - datx8 + 1, nb_bytes, error);
> - return TEST_FAILED;
> - }
> -
> - /* if the loop ended with a failing condition at any bit,
> - * lets look for the first previous success condition by unit
> - * stepping (minimal delay)
> - */
> - if (!success) {
> - log_debug("Fail region (PHASE) found phase idx %d\n",
> - phase_idx);
> - log_debug("Let's look for first success by DQS Unit steps\n");
> - /* This part, the algo always converge */
> - phase_idx--;
> -
> - /* escape if we find a success condition
> - * or if out of delay range.
> - */
> - while (!success && dqs_unit_delay_index >= 0) {
> - DQS_unit_delay(phy, datx8,
> - dqs_unit_delay_index);
> - BIST_test(phy, datx8, &result);
> - success = result.test_result;
> - dqs_unit_delay_index--;
> - }
> - /* if the loop ended with a success condition,
> - * the last delay Right OK (before hold violation)
> - * condition is then defined as following:
> - */
> - if (success) {
> - /* Hold the dely parameters of the the last
> - * delay Right OK condition.
> - * -1 to get back to current condition
> - */
> - last_right_ok.phase = phase_idx;
> - /*+1 to get back to current condition */
> - last_right_ok.unit = dqs_unit_delay_index + 1;
> - last_right_ok.bits_delay = 0xFFFFFFFF;
> - log_debug("Found %d\n", dqs_unit_delay_index);
> - } else {
> - /* the last OK condition is then with the
> - * previous phase_idx.
> - * -2 instead of -1 because at the last
> - * iteration of the while(),
> - * we incremented phase_idx
> - */
> - last_right_ok.phase = phase_idx - 1;
> - /* Nominal+1. Because we want the previous
> - * delay after reducing the phase delay.
> - */
> - last_right_ok.unit = 1;
> - last_right_ok.bits_delay = 0xFFFFFFFF;
> - log_debug("Not Found : try previous phase %d\n",
> - phase_idx - 1);
> -
> - DQS_phase_delay(phy, datx8, phase_idx - 1);
> - dqs_unit_delay_index = 0;
> - success = true;
> - while (success &&
> - (dqs_unit_delay_index <
> - MAX_DQS_UNIT_IDX)) {
> - DQS_unit_delay(phy, datx8,
> - dqs_unit_delay_index);
> - BIST_test(phy, datx8, &result);
> - success = result.test_result;
> - dqs_unit_delay_index++;
> - log_debug("dqs_unit_delay_index = %d, result = %d\n",
> - dqs_unit_delay_index, success);
> - }
> -
> - if (!success) {
> - last_right_ok.unit =
> - dqs_unit_delay_index - 1;
> - } else {
> - last_right_ok.unit = 0;
> - log_debug("ERROR: failed region not FOUND");
> - }
> - }
> - } else {
> - /* we can't find a failing condition at all bits
> - * ==> Just hold the last test condition
> - * (the max DQS delay)
> - * which is the most likely,
> - * the closest to a hold violation
> - * If we can't find a Fail condition after
> - * the Pass region, stick at this position
> - * In order to have max chances to find a fail
> - * when reducing DQ delays.
> - */
> - last_right_ok.phase = MAX_DQS_PHASE_IDX;
> - last_right_ok.unit = MAX_DQS_UNIT_IDX;
> - last_right_ok.bits_delay = 0xFFFFFFFF;
> - log_debug("Can't find the a fail condition\n");
> - }
> -
> - /* step 2:
> - * if we arrive at this stage, it means that we found the last
> - * Right OK condition (by tweeking the DQS delay). Or we simply
> - * pushed DQS delay to the max
> - * This means that by reducing the delay on some DQ bits,
> - * we should find a failing condition.
> - */
> - printf("Byte %d, DQS unit = %d, phase = %d\n",
> - datx8, last_right_ok.unit, last_right_ok.phase);
> - log_debug("Step2, unit = %d, phase = %d, bits delay=%x\n",
> - last_right_ok.unit, last_right_ok.phase,
> - last_right_ok.bits_delay);
> -
> - /* Restore the last_right_ok condtion. */
> - DQS_unit_delay(phy, datx8, last_right_ok.unit);
> - DQS_phase_delay(phy, datx8, last_right_ok.phase);
> - writel(last_right_ok.bits_delay, DXNDQTR(phy, datx8));
> -
> - /* train each bit
> - * reduce delay on each bit, and perform a write/read test
> - * and stop at the very first time it fails.
> - * the goal is the find the first failing condition
> - * for each bit.
> - * When we achieve this condition< for all the bits,
> - * we are sure they are aligned (+/- step resolution)
> - */
> - fail_found = 0;
> - for (bit_i = 0; bit_i < 8; bit_i++) {
> - if (ctrlc()) {
> - sprintf(string,
> - "interrupted at byte %d/%d, error=%d",
> - datx8 + 1, nb_bytes, error);
> - return error;
> - }
> - log_debug("deskewing bit %d:\n", bit_i);
> - success = 1; /* init */
> - /* Set all DQDLYn to maximum value.
> - * Only bit_i will be down-delayed
> - * ==> if we have a fail, it will be definitely
> - * from bit_i
> - */
> - writel(0xFFFFFFFF, DXNDQTR(phy, datx8));
> - /* Arriving at this stage,
> - * we have a success condition with delay = 3;
> - */
> - bit_i_delay_index = 3;
> -
> - /* escape if bit delay is out of range or
> - * if a fatil occurs
> - */
> - while ((bit_i_delay_index >= 0) && success) {
> - set_DQ_unit_delay(phy, datx8,
> - bit_i,
> - bit_i_delay_index);
> - BIST_test(phy, datx8, &result);
> - success = result.test_result;
> - bit_i_delay_index--;
> - }
> -
> - /* if escape with a fail condition
> - * ==> save this position for bit_i
> - */
> - if (!success) {
> - /* save the delay position.
> - * Add 1 because the while loop ended with a --,
> - * and that we need to hold the last success
> - * delay
> - */
> - deskew_delay[datx8][bit_i] =
> - bit_i_delay_index + 2;
> - if (deskew_delay[datx8][bit_i] > 3)
> - deskew_delay[datx8][bit_i] = 3;
> -
> - /* A flag that states we found at least a fail
> - * at one bit.
> - */
> - fail_found = 1;
> - log_debug("Fail found on bit %d, for delay = %d => deskew[%d][%d] = %d\n",
> - bit_i, bit_i_delay_index + 1,
> - datx8, bit_i,
> - deskew_delay[datx8][bit_i]);
> - } else {
> - /* if we can find a success condition by
> - * back-delaying this bit, just set the delay
> - * to 0 (the best deskew
> - * possible) and mark the bit.
> - */
> - deskew_delay[datx8][bit_i] = 0;
> - /* set a flag that will be used later
> - * in the report.
> - */
> - deskew_non_converge[datx8][bit_i] = 1;
> - log_debug("Fail not found on bit %d => deskew[%d][%d] = %d\n",
> - bit_i, datx8, bit_i,
> - deskew_delay[datx8][bit_i]);
> - }
> - }
> - log_debug("**********byte %d tuning complete************\n",
> - datx8);
> - /* If we can't find any failure by back delaying DQ lines,
> - * hold the default values
> - */
> - if (!fail_found) {
> - for (bit_i = 0; bit_i < 8; bit_i++)
> - deskew_delay[datx8][bit_i] = 0;
> - log_debug("The Deskew algorithm can't converge, there is too much margin in your design. Good job!\n");
> - }
> -
> - apply_deskew_results(phy, datx8, deskew_delay,
> - deskew_non_converge);
> - /* Restore nominal value for DQS delay */
> - DQS_phase_delay(phy, datx8, 3);
> - DQS_unit_delay(phy, datx8, 3);
> - /* disable byte after byte bits deskew */
> - clrbits_le32(DXNGCR(phy, datx8), DDRPHYC_DXNGCR_DXEN);
> - } /* end of byte deskew */
> -
> - /* re-enable all data bytes */
> - setbits_le32(&phy->dx0gcr, DDRPHYC_DXNGCR_DXEN);
> - setbits_le32(&phy->dx1gcr, DDRPHYC_DXNGCR_DXEN);
> - setbits_le32(&phy->dx2gcr, DDRPHYC_DXNGCR_DXEN);
> - setbits_le32(&phy->dx3gcr, DDRPHYC_DXNGCR_DXEN);
> -
> - if (error) {
> - sprintf(string, "error = %d", error);
> - return TEST_FAILED;
> - }
> -
> - return TEST_PASSED;
> -} /* end function */
> -
> -/* Trim DQS timings and set it in the centre of data eye.
> - * Look for a PPPPF region, then look for a FPPP region and finally select
> - * the mid of the FPPPPPF region
> - */
> -static enum test_result eye_training(struct stm32mp1_ddrctl *ctl,
> - struct stm32mp1_ddrphy *phy, char *string)
> -{
> - /*Stores the DQS trim values (PHASE index, unit index) */
> - u8 eye_training_val[NUM_BYTES][2];
> - u8 byte = 0;
> - struct BIST_result result;
> - s8 dqs_unit_delay_index = 0;
> - s8 phase_idx = 0;
> - s8 dqs_unit_delay_index_pass = 0;
> - s8 phase_idx_pass = 0;
> - u8 success = 0;
> - u8 left_phase_bound_found, right_phase_bound_found;
> - u8 left_unit_bound_found, right_unit_bound_found;
> - u8 left_bound_found, right_bound_found;
> - struct tuning_position left_bound, right_bound;
> - u8 error = 0;
> - u8 nb_bytes = get_nb_bytes(ctl);
> -
> - /*Disable DQS Drift Compensation*/
> - clrbits_le32(&phy->pgcr, DDRPHYC_PGCR_DFTCMP);
> - /*Disable all bytes*/
> - /* Disable automatic power down of DLL and IOs when disabling a byte
> - * (To avoid having to add programming and delay
> - * for a DLL re-lock when later re-enabling a disabled Byte Lane)
> - */
> - clrbits_le32(&phy->pgcr, DDRPHYC_PGCR_PDDISDX);
> -
> - /*Disable all data bytes */
> - clrbits_le32(&phy->dx0gcr, DDRPHYC_DXNGCR_DXEN);
> - clrbits_le32(&phy->dx1gcr, DDRPHYC_DXNGCR_DXEN);
> - clrbits_le32(&phy->dx2gcr, DDRPHYC_DXNGCR_DXEN);
> - clrbits_le32(&phy->dx3gcr, DDRPHYC_DXNGCR_DXEN);
> -
> - /* Config the BIST block */
> - config_BIST(ctl, phy);
> -
> - for (byte = 0; byte < nb_bytes; byte++) {
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d, error=%d",
> - byte + 1, nb_bytes, error);
> - return TEST_FAILED;
> - }
> - right_bound.phase = 0;
> - right_bound.unit = 0;
> -
> - left_bound.phase = 0;
> - left_bound.unit = 0;
> -
> - left_phase_bound_found = 0;
> - right_phase_bound_found = 0;
> -
> - left_unit_bound_found = 0;
> - right_unit_bound_found = 0;
> -
> - left_bound_found = 0;
> - right_bound_found = 0;
> -
> - /* Enable Byte (DXNGCR, bit DXEN) */
> - setbits_le32(DXNGCR(phy, byte), DDRPHYC_DXNGCR_DXEN);
> -
> - /* Select the byte lane for comparison of read data */
> - BIST_datx8_sel(phy, byte);
> -
> - /* Set DQS phase delay to the nominal value. */
> - phase_idx = _90deg;
> - phase_idx_pass = phase_idx;
> -
> - /* Set DQS unit delay to the nominal value. */
> - dqs_unit_delay_index = 3;
> - dqs_unit_delay_index_pass = dqs_unit_delay_index;
> - success = 0;
> -
> - log_debug("STEP0: Find Init delay\n");
> - /* STEP0: Find Init delay: a delay that put the system
> - * in a "Pass" condition then (TODO) update
> - * dqs_unit_delay_index_pass & phase_idx_pass
> - */
> - DQS_unit_delay(phy, byte, dqs_unit_delay_index);
> - DQS_phase_delay(phy, byte, phase_idx);
> - BIST_test(phy, byte, &result);
> - success = result.test_result;
> - /* If we have a fail in the nominal condition */
> - if (!success) {
> - /* Look at the left */
> - while (phase_idx >= 0 && !success) {
> - phase_idx--;
> - DQS_phase_delay(phy, byte, phase_idx);
> - BIST_test(phy, byte, &result);
> - success = result.test_result;
> - }
> - }
> - if (!success) {
> - /* if we can't find pass condition,
> - * then look at the right
> - */
> - phase_idx = _90deg;
> - while (phase_idx <= MAX_DQS_PHASE_IDX &&
> - !success) {
> - phase_idx++;
> - DQS_phase_delay(phy, byte,
> - phase_idx);
> - BIST_test(phy, byte, &result);
> - success = result.test_result;
> - }
> - }
> - /* save the pass condition */
> - if (success) {
> - phase_idx_pass = phase_idx;
> - } else {
> - printf("Result: Failed ");
> - printf("[Cannot DQS timings, ");
> - printf("there is no PASS region]\n");
> - error++;
> - continue;
> - }
> -
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d, error=%d",
> - byte + 1, nb_bytes, error);
> - return TEST_FAILED;
> - }
> - log_debug("STEP1: Find LEFT PHASE DQS Bound\n");
> - /* STEP1: Find LEFT PHASE DQS Bound */
> - while ((phase_idx >= 0) &&
> - (phase_idx <= MAX_DQS_PHASE_IDX) &&
> - !left_phase_bound_found) {
> - DQS_unit_delay(phy, byte,
> - dqs_unit_delay_index);
> - DQS_phase_delay(phy, byte,
> - phase_idx);
> - BIST_test(phy, byte, &result);
> - success = result.test_result;
> -
> - /*TODO: Manage the case were at the beginning
> - * there is already a fail
> - */
> - if (!success) {
> - /* the last pass condition */
> - left_bound.phase = ++phase_idx;
> - left_phase_bound_found = 1;
> - } else if (success) {
> - phase_idx--;
> - }
> - }
> - if (!left_phase_bound_found) {
> - left_bound.phase = 0;
> - phase_idx = 0;
> - }
> - /* If not found, lets take 0 */
> -
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d, error=%d",
> - byte + 1, nb_bytes, error);
> - return TEST_FAILED;
> - }
> - log_debug("STEP2: Find UNIT left bound\n");
> - /* STEP2: Find UNIT left bound */
> - while ((dqs_unit_delay_index >= 0) &&
> - !left_unit_bound_found) {
> - DQS_unit_delay(phy, byte,
> - dqs_unit_delay_index);
> - DQS_phase_delay(phy, byte, phase_idx);
> - BIST_test(phy, byte, &result);
> - success = result.test_result;
> - if (!success) {
> - left_bound.unit =
> - ++dqs_unit_delay_index;
> - left_unit_bound_found = 1;
> - left_bound_found = 1;
> - } else if (success) {
> - dqs_unit_delay_index--;
> - }
> - }
> -
> - /* If not found, lets take 0 */
> - if (!left_unit_bound_found)
> - left_bound.unit = 0;
> -
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d, error=%d",
> - byte + 1, nb_bytes, error);
> - return TEST_FAILED;
> - }
> - log_debug("STEP3: Find PHase right bound\n");
> - /* STEP3: Find PHase right bound, start with "pass"
> - * condition
> - */
> -
> - /* Set DQS phase delay to the pass value. */
> - phase_idx = phase_idx_pass;
> -
> - /* Set DQS unit delay to the pass value. */
> - dqs_unit_delay_index = dqs_unit_delay_index_pass;
> -
> - while ((phase_idx <= MAX_DQS_PHASE_IDX) &&
> - !right_phase_bound_found) {
> - DQS_unit_delay(phy, byte,
> - dqs_unit_delay_index);
> - DQS_phase_delay(phy, byte, phase_idx);
> - BIST_test(phy, byte, &result);
> - success = result.test_result;
> - if (!success) {
> - /* the last pass condition */
> - right_bound.phase = --phase_idx;
> - right_phase_bound_found = 1;
> - } else if (success) {
> - phase_idx++;
> - }
> - }
> -
> - /* If not found, lets take the max value */
> - if (!right_phase_bound_found) {
> - right_bound.phase = MAX_DQS_PHASE_IDX;
> - phase_idx = MAX_DQS_PHASE_IDX;
> - }
> -
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d, error=%d",
> - byte + 1, nb_bytes, error);
> - return TEST_FAILED;
> - }
> - log_debug("STEP4: Find UNIT right bound\n");
> - /* STEP4: Find UNIT right bound */
> - while ((dqs_unit_delay_index <= MAX_DQS_UNIT_IDX) &&
> - !right_unit_bound_found) {
> - DQS_unit_delay(phy, byte,
> - dqs_unit_delay_index);
> - DQS_phase_delay(phy, byte, phase_idx);
> - BIST_test(phy, byte, &result);
> - success = result.test_result;
> - if (!success) {
> - right_bound.unit =
> - --dqs_unit_delay_index;
> - right_unit_bound_found = 1;
> - right_bound_found = 1;
> - } else if (success) {
> - dqs_unit_delay_index++;
> - }
> - }
> - /* If not found, lets take the max value */
> - if (!right_unit_bound_found)
> - right_bound.unit = MAX_DQS_UNIT_IDX;
> -
> - /* If we found a regular FAil Pass FAil pattern
> - * FFPPPPPPFF
> - * OR PPPPPFF Or FFPPPPP
> - */
> -
> - if (left_bound_found || right_bound_found) {
> - eye_training_val[byte][0] = (right_bound.phase +
> - left_bound.phase) / 2;
> - eye_training_val[byte][1] = (right_bound.unit +
> - left_bound.unit) / 2;
> -
> - /* If we already lost 1/2PHASE Tuning,
> - * let's try to recover by ++ on unit
> - */
> - if (((right_bound.phase + left_bound.phase) % 2 == 1) &&
> - eye_training_val[byte][1] != MAX_DQS_UNIT_IDX)
> - eye_training_val[byte][1]++;
> - log_debug("** found phase : %d - %d & unit %d - %d\n",
> - right_bound.phase, left_bound.phase,
> - right_bound.unit, left_bound.unit);
> - log_debug("** calculating mid region: phase: %d unit: %d (nominal is 3)\n",
> - eye_training_val[byte][0],
> - eye_training_val[byte][1]);
> - } else {
> - /* PPPPPPPPPP, we're already good.
> - * Set nominal values.
> - */
> - eye_training_val[byte][0] = 3;
> - eye_training_val[byte][1] = 3;
> - }
> - DQS_phase_delay(phy, byte, eye_training_val[byte][0]);
> - DQS_unit_delay(phy, byte, eye_training_val[byte][1]);
> -
> - printf("Byte %d, DQS unit = %d, phase = %d\n",
> - byte,
> - eye_training_val[byte][1],
> - eye_training_val[byte][0]);
> - }
> -
> - if (error) {
> - sprintf(string, "error = %d", error);
> - return TEST_FAILED;
> - }
> -
> - return TEST_PASSED;
> -}
> -
> -static void display_reg_results(struct stm32mp1_ddrphy *phy, u8 byte)
> -{
> - u8 i = 0;
> -
> - printf("Byte %d Dekew result, bit0 delay, bit1 delay...bit8 delay\n ",
> - byte);
> -
> - for (i = 0; i < 8; i++)
> - printf("%d ", DQ_unit_index(phy, byte, i));
> - printf("\n");
> -
> - printf("dxndllcr: [%08x] val:%08x\n",
> - DXNDLLCR(phy, byte),
> - readl(DXNDLLCR(phy, byte)));
> - printf("dxnqdstr: [%08x] val:%08x\n",
> - DXNDQSTR(phy, byte),
> - readl(DXNDQSTR(phy, byte)));
> - printf("dxndqtr: [%08x] val:%08x\n",
> - DXNDQTR(phy, byte),
> - readl(DXNDQTR(phy, byte)));
> -}
> -
> -/* analyse the dgs gating log table, and determine the midpoint.*/
> -static u8 set_midpoint_read_dqs_gating(struct stm32mp1_ddrphy *phy, u8 byte,
> - u8 dqs_gating[NUM_BYTES]
> - [MAX_GSL_IDX + 1]
> - [MAX_GPS_IDX + 1])
> -{
> - /* stores the dqs gate values (gsl index, gps index) */
> - u8 dqs_gate_values[NUM_BYTES][2];
> - u8 gsl_idx, gps_idx = 0;
> - u8 left_bound_idx[2] = {0, 0};
> - u8 right_bound_idx[2] = {0, 0};
> - u8 left_bound_found = 0;
> - u8 right_bound_found = 0;
> - u8 intermittent = 0;
> - u8 value;
> -
> - for (gsl_idx = 0; gsl_idx <= MAX_GSL_IDX; gsl_idx++) {
> - for (gps_idx = 0; gps_idx <= MAX_GPS_IDX; gps_idx++) {
> - value = dqs_gating[byte][gsl_idx][gps_idx];
> - if (value == 1 && left_bound_found == 0) {
> - left_bound_idx[0] = gsl_idx;
> - left_bound_idx[1] = gps_idx;
> - left_bound_found = 1;
> - } else if (value == 0 &&
> - left_bound_found == 1 &&
> - !right_bound_found) {
> - if (gps_idx == 0) {
> - right_bound_idx[0] = gsl_idx - 1;
> - right_bound_idx[1] = MAX_GPS_IDX;
> - } else {
> - right_bound_idx[0] = gsl_idx;
> - right_bound_idx[1] = gps_idx - 1;
> - }
> - right_bound_found = 1;
> - } else if (value == 1 &&
> - right_bound_found == 1) {
> - intermittent = 1;
> - }
> - }
> - }
> -
> - /* if only ppppppp is found, there is no mid region. */
> - if (left_bound_idx[0] == 0 && left_bound_idx[1] == 0 &&
> - right_bound_idx[0] == 0 && right_bound_idx[1] == 0)
> - intermittent = 1;
> -
> - /*if we found a regular fail pass fail pattern ffppppppff
> - * or pppppff or ffppppp
> - */
> - if (!intermittent) {
> - /*if we found a regular fail pass fail pattern ffppppppff
> - * or pppppff or ffppppp
> - */
> - if (left_bound_found || right_bound_found) {
> - log_debug("idx0(%d): %d %d idx1(%d) : %d %d\n",
> - left_bound_found,
> - right_bound_idx[0], left_bound_idx[0],
> - right_bound_found,
> - right_bound_idx[1], left_bound_idx[1]);
> - dqs_gate_values[byte][0] =
> - (right_bound_idx[0] + left_bound_idx[0]) / 2;
> - dqs_gate_values[byte][1] =
> - (right_bound_idx[1] + left_bound_idx[1]) / 2;
> - /* if we already lost 1/2gsl tuning,
> - * let's try to recover by ++ on gps
> - */
> - if (((right_bound_idx[0] +
> - left_bound_idx[0]) % 2 == 1) &&
> - dqs_gate_values[byte][1] != MAX_GPS_IDX)
> - dqs_gate_values[byte][1]++;
> - /* if we already lost 1/2gsl tuning and gps is on max*/
> - else if (((right_bound_idx[0] +
> - left_bound_idx[0]) % 2 == 1) &&
> - dqs_gate_values[byte][1] == MAX_GPS_IDX) {
> - dqs_gate_values[byte][1] = 0;
> - dqs_gate_values[byte][0]++;
> - }
> - /* if we have gsl left and write limit too close
> - * (difference=1)
> - */
> - if (((right_bound_idx[0] - left_bound_idx[0]) == 1)) {
> - dqs_gate_values[byte][1] = (left_bound_idx[1] +
> - right_bound_idx[1] +
> - 4) / 2;
> - if (dqs_gate_values[byte][1] >= 4) {
> - dqs_gate_values[byte][0] =
> - right_bound_idx[0];
> - dqs_gate_values[byte][1] -= 4;
> - } else {
> - dqs_gate_values[byte][0] =
> - left_bound_idx[0];
> - }
> - }
> - log_debug("*******calculating mid region: system latency: %d phase: %d********\n",
> - dqs_gate_values[byte][0],
> - dqs_gate_values[byte][1]);
> - log_debug("*******the nominal values were system latency: 0 phase: 2*******\n");
> - }
> - } else {
> - /* if intermitant, restore defaut values */
> - log_debug("dqs gating:no regular fail/pass/fail found. defaults values restored.\n");
> - dqs_gate_values[byte][0] = 0;
> - dqs_gate_values[byte][1] = 2;
> - }
> - set_r0dgsl_delay(phy, byte, dqs_gate_values[byte][0]);
> - set_r0dgps_delay(phy, byte, dqs_gate_values[byte][1]);
> - printf("Byte %d, R0DGSL = %d, R0DGPS = %d\n",
> - byte, dqs_gate_values[byte][0], dqs_gate_values[byte][1]);
> -
> - /* return 0 if intermittent or if both left_bound
> - * and right_bound are not found
> - */
> - return !(intermittent || (left_bound_found && right_bound_found));
> -}
> -
> -static enum test_result read_dqs_gating(struct stm32mp1_ddrctl *ctl,
> - struct stm32mp1_ddrphy *phy,
> - char *string)
> -{
> - /* stores the log of pass/fail */
> - u8 dqs_gating[NUM_BYTES][MAX_GSL_IDX + 1][MAX_GPS_IDX + 1];
> - u8 byte, gsl_idx, gps_idx = 0;
> - struct BIST_result result;
> - u8 success = 0;
> - u8 nb_bytes = get_nb_bytes(ctl);
> -
> - memset(dqs_gating, 0x0, sizeof(dqs_gating));
> -
> - /*disable dqs drift compensation*/
> - clrbits_le32(&phy->pgcr, DDRPHYC_PGCR_DFTCMP);
> - /*disable all bytes*/
> - /* disable automatic power down of dll and ios when disabling a byte
> - * (to avoid having to add programming and delay
> - * for a dll re-lock when later re-enabling a disabled byte lane)
> - */
> - clrbits_le32(&phy->pgcr, DDRPHYC_PGCR_PDDISDX);
> -
> - /* disable all data bytes */
> - clrbits_le32(&phy->dx0gcr, DDRPHYC_DXNGCR_DXEN);
> - clrbits_le32(&phy->dx1gcr, DDRPHYC_DXNGCR_DXEN);
> - clrbits_le32(&phy->dx2gcr, DDRPHYC_DXNGCR_DXEN);
> - clrbits_le32(&phy->dx3gcr, DDRPHYC_DXNGCR_DXEN);
> -
> - /* config the bist block */
> - config_BIST(ctl, phy);
> -
> - for (byte = 0; byte < nb_bytes; byte++) {
> - if (ctrlc()) {
> - sprintf(string, "interrupted at byte %d/%d",
> - byte + 1, nb_bytes);
> - return TEST_FAILED;
> - }
> - /* enable byte x (dxngcr, bit dxen) */
> - setbits_le32(DXNGCR(phy, byte), DDRPHYC_DXNGCR_DXEN);
> -
> - /* select the byte lane for comparison of read data */
> - BIST_datx8_sel(phy, byte);
> - for (gsl_idx = 0; gsl_idx <= MAX_GSL_IDX; gsl_idx++) {
> - for (gps_idx = 0; gps_idx <= MAX_GPS_IDX; gps_idx++) {
> - if (ctrlc()) {
> - sprintf(string,
> - "interrupted at byte %d/%d",
> - byte + 1, nb_bytes);
> - return TEST_FAILED;
> - }
> - /* write cfg to dxndqstr */
> - set_r0dgsl_delay(phy, byte, gsl_idx);
> - set_r0dgps_delay(phy, byte, gps_idx);
> -
> - BIST_test(phy, byte, &result);
> - success = result.test_result;
> - if (success)
> - dqs_gating[byte][gsl_idx][gps_idx] = 1;
> - itm_soft_reset(phy);
> - }
> - }
> - set_midpoint_read_dqs_gating(phy, byte, dqs_gating);
> - /* dummy reads */
> - readl(0xc0000000);
> - readl(0xc0000000);
> - }
> -
> - /* re-enable drift compensation */
> - /* setbits_le32(&phy->pgcr, DDRPHYC_PGCR_DFTCMP); */
> - return TEST_PASSED;
> -}
> -
> -/****************************************************************
> - * TEST
> - ****************************************************************
> - */
> -static enum test_result do_read_dqs_gating(struct stm32mp1_ddrctl *ctl,
> - struct stm32mp1_ddrphy *phy,
> - char *string, int argc,
> - char *argv[])
> -{
> - u32 rfshctl3 = readl(&ctl->rfshctl3);
> - u32 pwrctl = readl(&ctl->pwrctl);
> - u32 derateen = readl(&ctl->derateen);
> - enum test_result res;
> -
> - writel(0x0, &ctl->derateen);
> - stm32mp1_refresh_disable(ctl);
> -
> - res = read_dqs_gating(ctl, phy, string);
> -
> - stm32mp1_refresh_restore(ctl, rfshctl3, pwrctl);
> - writel(derateen, &ctl->derateen);
> -
> - return res;
> -}
> -
> -static enum test_result do_bit_deskew(struct stm32mp1_ddrctl *ctl,
> - struct stm32mp1_ddrphy *phy,
> - char *string, int argc, char *argv[])
> -{
> - u32 rfshctl3 = readl(&ctl->rfshctl3);
> - u32 pwrctl = readl(&ctl->pwrctl);
> - u32 derateen = readl(&ctl->derateen);
> - enum test_result res;
> -
> - writel(0x0, &ctl->derateen);
> - stm32mp1_refresh_disable(ctl);
> -
> - res = bit_deskew(ctl, phy, string);
> -
> - stm32mp1_refresh_restore(ctl, rfshctl3, pwrctl);
> - writel(derateen, &ctl->derateen);
> -
> - return res;
> -}
> -
> -static enum test_result do_eye_training(struct stm32mp1_ddrctl *ctl,
> - struct stm32mp1_ddrphy *phy,
> - char *string, int argc, char *argv[])
> -{
> - u32 rfshctl3 = readl(&ctl->rfshctl3);
> - u32 pwrctl = readl(&ctl->pwrctl);
> - u32 derateen = readl(&ctl->derateen);
> - enum test_result res;
> -
> - writel(0x0, &ctl->derateen);
> - stm32mp1_refresh_disable(ctl);
> -
> - res = eye_training(ctl, phy, string);
> -
> - stm32mp1_refresh_restore(ctl, rfshctl3, pwrctl);
> - writel(derateen, &ctl->derateen);
> -
> - return res;
> -}
> -
> -static enum test_result do_display(struct stm32mp1_ddrctl *ctl,
> - struct stm32mp1_ddrphy *phy,
> - char *string, int argc, char *argv[])
> -{
> - int byte;
> - u8 nb_bytes = get_nb_bytes(ctl);
> -
> - for (byte = 0; byte < nb_bytes; byte++)
> - display_reg_results(phy, byte);
> -
> - return TEST_PASSED;
> -}
> -
> -static enum test_result do_bist_config(struct stm32mp1_ddrctl *ctl,
> - struct stm32mp1_ddrphy *phy,
> - char *string, int argc, char *argv[])
> -{
> - unsigned long value;
> -
> - if (argc > 0) {
> - if (strict_strtoul(argv[0], 0, &value) < 0) {
> - sprintf(string, "invalid nbErr %s", argv[0]);
> - return TEST_FAILED;
> - }
> - BIST_error_max = value;
> - }
> - if (argc > 1) {
> - if (strict_strtoul(argv[1], 0, &value) < 0) {
> - sprintf(string, "invalid Seed %s", argv[1]);
> - return TEST_FAILED;
> - }
> - BIST_seed = value;
> - }
> - printf("Bist.nbErr = %d\n", BIST_error_max);
> - if (BIST_seed)
> - printf("Bist.Seed = 0x%x\n", BIST_seed);
> - else
> - printf("Bist.Seed = random\n");
> -
> - return TEST_PASSED;
> -}
> -
> -/****************************************************************
> - * TEST Description
> - ****************************************************************
> - */
> -
> -const struct test_desc tuning[] = {
> - {do_read_dqs_gating, "Read DQS gating",
> - "software read DQS Gating", "", 0 },
> - {do_bit_deskew, "Bit de-skew", "", "", 0 },
> - {do_eye_training, "Eye Training", "or DQS training", "", 0 },
> - {do_display, "Display registers", "", "", 0 },
> - {do_bist_config, "Bist config", "[nbErr] [seed]",
> - "configure Bist test", 2},
> -};
> -
> -const int tuning_nb = ARRAY_SIZE(tuning);
>
Reviewed-by: Patrice Chotard <patrice.chotard at foss.st.com>
Thanks
Patrice
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