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smaeul-u-boot/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
Doug Anderson c9334fcda9 DMC: exynos5420: Gate CLKM to when reading PHY_CON13 
when CLKM is running.  If we stop CLKM when sampling it the glitches
all go away, so we'll do that as per Samsung suggestion.

We also check the "is it locked" bits of PHY_CON13 and loop until they
show the the value sampled actually represents a locked value.  It
doesn't appear that the glitching and "is it locked" are related, but
it seems wise to wait until the PHY tells us the value is good before
we use it.  In practice we will not loop more than a couple times (and
usually won't loop at all).

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2014-06-13 17:05:13 +09:00

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/*
* DDR3 mem setup file for board based on EXYNOS5
*
* Copyright (C) 2012 Samsung Electronics
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/cpu.h>
#include <asm/arch/dmc.h>
#include <asm/arch/power.h>
#include "common_setup.h"
#include "exynos5_setup.h"
#include "clock_init.h"
#define TIMEOUT 10000
#ifdef CONFIG_EXYNOS5250
static void reset_phy_ctrl(void)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
writel(DDR3PHY_CTRL_PHY_RESET_OFF, &clk->lpddr3phy_ctrl);
writel(DDR3PHY_CTRL_PHY_RESET, &clk->lpddr3phy_ctrl);
}
int ddr3_mem_ctrl_init(struct mem_timings *mem, int reset)
{
unsigned int val;
struct exynos5_phy_control *phy0_ctrl, *phy1_ctrl;
struct exynos5_dmc *dmc;
int i;
phy0_ctrl = (struct exynos5_phy_control *)samsung_get_base_dmc_phy();
phy1_ctrl = (struct exynos5_phy_control *)(samsung_get_base_dmc_phy()
+ DMC_OFFSET);
dmc = (struct exynos5_dmc *)samsung_get_base_dmc_ctrl();
if (reset)
reset_phy_ctrl();
/* Set Impedance Output Driver */
val = (mem->impedance << CA_CK_DRVR_DS_OFFSET) |
(mem->impedance << CA_CKE_DRVR_DS_OFFSET) |
(mem->impedance << CA_CS_DRVR_DS_OFFSET) |
(mem->impedance << CA_ADR_DRVR_DS_OFFSET);
writel(val, &phy0_ctrl->phy_con39);
writel(val, &phy1_ctrl->phy_con39);
/* Set Read Latency and Burst Length for PHY0 and PHY1 */
val = (mem->ctrl_bstlen << PHY_CON42_CTRL_BSTLEN_SHIFT) |
(mem->ctrl_rdlat << PHY_CON42_CTRL_RDLAT_SHIFT);
writel(val, &phy0_ctrl->phy_con42);
writel(val, &phy1_ctrl->phy_con42);
/* ZQ Calibration */
if (dmc_config_zq(mem, &phy0_ctrl->phy_con16, &phy1_ctrl->phy_con16,
&phy0_ctrl->phy_con17, &phy1_ctrl->phy_con17))
return SETUP_ERR_ZQ_CALIBRATION_FAILURE;
/* DQ Signal */
writel(mem->phy0_pulld_dqs, &phy0_ctrl->phy_con14);
writel(mem->phy1_pulld_dqs, &phy1_ctrl->phy_con14);
writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)
| (mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT),
&dmc->concontrol);
update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);
/* DQS Signal */
writel(mem->phy0_dqs, &phy0_ctrl->phy_con4);
writel(mem->phy1_dqs, &phy1_ctrl->phy_con4);
writel(mem->phy0_dq, &phy0_ctrl->phy_con6);
writel(mem->phy1_dq, &phy1_ctrl->phy_con6);
writel(mem->phy0_tFS, &phy0_ctrl->phy_con10);
writel(mem->phy1_tFS, &phy1_ctrl->phy_con10);
val = (mem->ctrl_start_point << PHY_CON12_CTRL_START_POINT_SHIFT) |
(mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) |
(mem->ctrl_dll_on << PHY_CON12_CTRL_DLL_ON_SHIFT) |
(mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT);
writel(val, &phy0_ctrl->phy_con12);
writel(val, &phy1_ctrl->phy_con12);
/* Start DLL locking */
writel(val | (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT),
&phy0_ctrl->phy_con12);
writel(val | (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT),
&phy1_ctrl->phy_con12);
update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);
writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
&dmc->concontrol);
/* Memory Channel Inteleaving Size */
writel(mem->iv_size, &dmc->ivcontrol);
writel(mem->memconfig, &dmc->memconfig0);
writel(mem->memconfig, &dmc->memconfig1);
writel(mem->membaseconfig0, &dmc->membaseconfig0);
writel(mem->membaseconfig1, &dmc->membaseconfig1);
/* Precharge Configuration */
writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
&dmc->prechconfig);
/* Power Down mode Configuration */
writel(mem->dpwrdn_cyc << PWRDNCONFIG_DPWRDN_CYC_SHIFT |
mem->dsref_cyc << PWRDNCONFIG_DSREF_CYC_SHIFT,
&dmc->pwrdnconfig);
/* TimingRow, TimingData, TimingPower and Timingaref
* values as per Memory AC parameters
*/
writel(mem->timing_ref, &dmc->timingref);
writel(mem->timing_row, &dmc->timingrow);
writel(mem->timing_data, &dmc->timingdata);
writel(mem->timing_power, &dmc->timingpower);
/* Send PALL command */
dmc_config_prech(mem, &dmc->directcmd);
/* Send NOP, MRS and ZQINIT commands */
dmc_config_mrs(mem, &dmc->directcmd);
if (mem->gate_leveling_enable) {
val = PHY_CON0_RESET_VAL;
val |= P0_CMD_EN;
writel(val, &phy0_ctrl->phy_con0);
writel(val, &phy1_ctrl->phy_con0);
val = PHY_CON2_RESET_VAL;
val |= INIT_DESKEW_EN;
writel(val, &phy0_ctrl->phy_con2);
writel(val, &phy1_ctrl->phy_con2);
val = PHY_CON0_RESET_VAL;
val |= P0_CMD_EN;
val |= BYTE_RDLVL_EN;
writel(val, &phy0_ctrl->phy_con0);
writel(val, &phy1_ctrl->phy_con0);
val = (mem->ctrl_start_point <<
PHY_CON12_CTRL_START_POINT_SHIFT) |
(mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) |
(mem->ctrl_force << PHY_CON12_CTRL_FORCE_SHIFT) |
(mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT) |
(mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT);
writel(val, &phy0_ctrl->phy_con12);
writel(val, &phy1_ctrl->phy_con12);
val = PHY_CON2_RESET_VAL;
val |= INIT_DESKEW_EN;
val |= RDLVL_GATE_EN;
writel(val, &phy0_ctrl->phy_con2);
writel(val, &phy1_ctrl->phy_con2);
val = PHY_CON0_RESET_VAL;
val |= P0_CMD_EN;
val |= BYTE_RDLVL_EN;
val |= CTRL_SHGATE;
writel(val, &phy0_ctrl->phy_con0);
writel(val, &phy1_ctrl->phy_con0);
val = PHY_CON1_RESET_VAL;
val &= ~(CTRL_GATEDURADJ_MASK);
writel(val, &phy0_ctrl->phy_con1);
writel(val, &phy1_ctrl->phy_con1);
writel(CTRL_RDLVL_GATE_ENABLE, &dmc->rdlvl_config);
i = TIMEOUT;
while ((readl(&dmc->phystatus) &
(RDLVL_COMPLETE_CHO | RDLVL_COMPLETE_CH1)) !=
(RDLVL_COMPLETE_CHO | RDLVL_COMPLETE_CH1) && i > 0) {
/*
* TODO(waihong): Comment on how long this take to
* timeout
*/
sdelay(100);
i--;
}
if (!i)
return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;
writel(CTRL_RDLVL_GATE_DISABLE, &dmc->rdlvl_config);
writel(0, &phy0_ctrl->phy_con14);
writel(0, &phy1_ctrl->phy_con14);
val = (mem->ctrl_start_point <<
PHY_CON12_CTRL_START_POINT_SHIFT) |
(mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) |
(mem->ctrl_force << PHY_CON12_CTRL_FORCE_SHIFT) |
(mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT) |
(mem->ctrl_dll_on << PHY_CON12_CTRL_DLL_ON_SHIFT) |
(mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT);
writel(val, &phy0_ctrl->phy_con12);
writel(val, &phy1_ctrl->phy_con12);
update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);
}
/* Send PALL command */
dmc_config_prech(mem, &dmc->directcmd);
writel(mem->memcontrol, &dmc->memcontrol);
/* Set DMC Concontrol and enable auto-refresh counter */
writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)
| (mem->aref_en << CONCONTROL_AREF_EN_SHIFT), &dmc->concontrol);
return 0;
}
#endif
#ifdef CONFIG_EXYNOS5420
int ddr3_mem_ctrl_init(struct mem_timings *mem, int reset)
{
struct exynos5420_clock *clk =
(struct exynos5420_clock *)samsung_get_base_clock();
struct exynos5420_power *power =
(struct exynos5420_power *)samsung_get_base_power();
struct exynos5420_phy_control *phy0_ctrl, *phy1_ctrl;
struct exynos5420_dmc *drex0, *drex1;
struct exynos5420_tzasc *tzasc0, *tzasc1;
uint32_t val, n_lock_r, n_lock_w_phy0, n_lock_w_phy1;
uint32_t lock0_info, lock1_info;
int chip;
int i;
phy0_ctrl = (struct exynos5420_phy_control *)samsung_get_base_dmc_phy();
phy1_ctrl = (struct exynos5420_phy_control *)(samsung_get_base_dmc_phy()
+ DMC_OFFSET);
drex0 = (struct exynos5420_dmc *)samsung_get_base_dmc_ctrl();
drex1 = (struct exynos5420_dmc *)(samsung_get_base_dmc_ctrl()
+ DMC_OFFSET);
tzasc0 = (struct exynos5420_tzasc *)samsung_get_base_dmc_tzasc();
tzasc1 = (struct exynos5420_tzasc *)(samsung_get_base_dmc_tzasc()
+ DMC_OFFSET);
/* Enable PAUSE for DREX */
setbits_le32(&clk->pause, ENABLE_BIT);
/* Enable BYPASS mode */
setbits_le32(&clk->bpll_con1, BYPASS_EN);
writel(MUX_BPLL_SEL_FOUTBPLL, &clk->src_cdrex);
do {
val = readl(&clk->mux_stat_cdrex);
val &= BPLL_SEL_MASK;
} while (val != FOUTBPLL);
clrbits_le32(&clk->bpll_con1, BYPASS_EN);
/* Specify the DDR memory type as DDR3 */
val = readl(&phy0_ctrl->phy_con0);
val &= ~(PHY_CON0_CTRL_DDR_MODE_MASK << PHY_CON0_CTRL_DDR_MODE_SHIFT);
val |= (DDR_MODE_DDR3 << PHY_CON0_CTRL_DDR_MODE_SHIFT);
writel(val, &phy0_ctrl->phy_con0);
val = readl(&phy1_ctrl->phy_con0);
val &= ~(PHY_CON0_CTRL_DDR_MODE_MASK << PHY_CON0_CTRL_DDR_MODE_SHIFT);
val |= (DDR_MODE_DDR3 << PHY_CON0_CTRL_DDR_MODE_SHIFT);
writel(val, &phy1_ctrl->phy_con0);
/* Set Read Latency and Burst Length for PHY0 and PHY1 */
val = (mem->ctrl_bstlen << PHY_CON42_CTRL_BSTLEN_SHIFT) |
(mem->ctrl_rdlat << PHY_CON42_CTRL_RDLAT_SHIFT);
writel(val, &phy0_ctrl->phy_con42);
writel(val, &phy1_ctrl->phy_con42);
val = readl(&phy0_ctrl->phy_con26);
val &= ~(T_WRDATA_EN_MASK << T_WRDATA_EN_OFFSET);
val |= (T_WRDATA_EN_DDR3 << T_WRDATA_EN_OFFSET);
writel(val, &phy0_ctrl->phy_con26);
val = readl(&phy1_ctrl->phy_con26);
val &= ~(T_WRDATA_EN_MASK << T_WRDATA_EN_OFFSET);
val |= (T_WRDATA_EN_DDR3 << T_WRDATA_EN_OFFSET);
writel(val, &phy1_ctrl->phy_con26);
/*
* Set Driver strength for CK, CKE, CS & CA to 0x7
* Set Driver strength for Data Slice 0~3 to 0x7
*/
val = (0x7 << CA_CK_DRVR_DS_OFFSET) | (0x7 << CA_CKE_DRVR_DS_OFFSET) |
(0x7 << CA_CS_DRVR_DS_OFFSET) | (0x7 << CA_ADR_DRVR_DS_OFFSET);
val |= (0x7 << DA_3_DS_OFFSET) | (0x7 << DA_2_DS_OFFSET) |
(0x7 << DA_1_DS_OFFSET) | (0x7 << DA_0_DS_OFFSET);
writel(val, &phy0_ctrl->phy_con39);
writel(val, &phy1_ctrl->phy_con39);
/* ZQ Calibration */
if (dmc_config_zq(mem, &phy0_ctrl->phy_con16, &phy1_ctrl->phy_con16,
&phy0_ctrl->phy_con17, &phy1_ctrl->phy_con17))
return SETUP_ERR_ZQ_CALIBRATION_FAILURE;
clrbits_le32(&phy0_ctrl->phy_con16, ZQ_CLK_DIV_EN);
clrbits_le32(&phy1_ctrl->phy_con16, ZQ_CLK_DIV_EN);
/* DQ Signal */
val = readl(&phy0_ctrl->phy_con14);
val |= mem->phy0_pulld_dqs;
writel(val, &phy0_ctrl->phy_con14);
val = readl(&phy1_ctrl->phy_con14);
val |= mem->phy1_pulld_dqs;
writel(val, &phy1_ctrl->phy_con14);
val = MEM_TERM_EN | PHY_TERM_EN;
writel(val, &drex0->phycontrol0);
writel(val, &drex1->phycontrol0);
writel(mem->concontrol |
(mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT) |
(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
&drex0->concontrol);
writel(mem->concontrol |
(mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT) |
(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
&drex1->concontrol);
do {
val = readl(&drex0->phystatus);
} while ((val & DFI_INIT_COMPLETE) != DFI_INIT_COMPLETE);
do {
val = readl(&drex1->phystatus);
} while ((val & DFI_INIT_COMPLETE) != DFI_INIT_COMPLETE);
clrbits_le32(&drex0->concontrol, DFI_INIT_START);
clrbits_le32(&drex1->concontrol, DFI_INIT_START);
update_reset_dll(&drex0->phycontrol0, DDR_MODE_DDR3);
update_reset_dll(&drex1->phycontrol0, DDR_MODE_DDR3);
/*
* Set Base Address:
* 0x2000_0000 ~ 0x5FFF_FFFF
* 0x6000_0000 ~ 0x9FFF_FFFF
*/
/* MEMBASECONFIG0 */
val = DMC_MEMBASECONFIGX_CHIP_BASE(DMC_CHIP_BASE_0) |
DMC_MEMBASECONFIGX_CHIP_MASK(DMC_CHIP_MASK);
writel(val, &tzasc0->membaseconfig0);
writel(val, &tzasc1->membaseconfig0);
/* MEMBASECONFIG1 */
val = DMC_MEMBASECONFIGX_CHIP_BASE(DMC_CHIP_BASE_1) |
DMC_MEMBASECONFIGX_CHIP_MASK(DMC_CHIP_MASK);
writel(val, &tzasc0->membaseconfig1);
writel(val, &tzasc1->membaseconfig1);
/*
* Memory Channel Inteleaving Size
* Ares Channel interleaving = 128 bytes
*/
/* MEMCONFIG0/1 */
writel(mem->memconfig, &tzasc0->memconfig0);
writel(mem->memconfig, &tzasc1->memconfig0);
writel(mem->memconfig, &tzasc0->memconfig1);
writel(mem->memconfig, &tzasc1->memconfig1);
/* Precharge Configuration */
writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
&drex0->prechconfig0);
writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
&drex1->prechconfig0);
/*
* TimingRow, TimingData, TimingPower and Timingaref
* values as per Memory AC parameters
*/
writel(mem->timing_ref, &drex0->timingref);
writel(mem->timing_ref, &drex1->timingref);
writel(mem->timing_row, &drex0->timingrow0);
writel(mem->timing_row, &drex1->timingrow0);
writel(mem->timing_data, &drex0->timingdata0);
writel(mem->timing_data, &drex1->timingdata0);
writel(mem->timing_power, &drex0->timingpower0);
writel(mem->timing_power, &drex1->timingpower0);
if (reset) {
/*
* Send NOP, MRS and ZQINIT commands
* Sending MRS command will reset the DRAM. We should not be
* reseting the DRAM after resume, this will lead to memory
* corruption as DRAM content is lost after DRAM reset
*/
dmc_config_mrs(mem, &drex0->directcmd);
dmc_config_mrs(mem, &drex1->directcmd);
}
/*
* Get PHY_CON13 from both phys. Gate CLKM around reading since
* PHY_CON13 is glitchy when CLKM is running. We're paranoid and
* wait until we get a "fine lock", though a coarse lock is probably
* OK (we only use the coarse numbers below). We try to gate the
* clock for as short a time as possible in case SDRAM is somehow
* sensitive. sdelay(10) in the loop is arbitrary to make sure
* there is some time for PHY_CON13 to get updated. In practice
* no delay appears to be needed.
*/
val = readl(&clk->gate_bus_cdrex);
while (true) {
writel(val & ~0x1, &clk->gate_bus_cdrex);
lock0_info = readl(&phy0_ctrl->phy_con13);
writel(val, &clk->gate_bus_cdrex);
if ((lock0_info & CTRL_FINE_LOCKED) == CTRL_FINE_LOCKED)
break;
sdelay(10);
}
while (true) {
writel(val & ~0x2, &clk->gate_bus_cdrex);
lock1_info = readl(&phy1_ctrl->phy_con13);
writel(val, &clk->gate_bus_cdrex);
if ((lock1_info & CTRL_FINE_LOCKED) == CTRL_FINE_LOCKED)
break;
sdelay(10);
}
if (!reset) {
/*
* During Suspend-Resume & S/W-Reset, as soon as PMU releases
* pad retention, CKE goes high. This causes memory contents
* not to be retained during DRAM initialization. Therfore,
* there is a new control register(0x100431e8[28]) which lets us
* release pad retention and retain the memory content until the
* initialization is complete.
*/
writel(PAD_RETENTION_DRAM_COREBLK_VAL,
&power->pad_retention_dram_coreblk_option);
do {
val = readl(&power->pad_retention_dram_status);
} while (val != 0x1);
/*
* CKE PAD retention disables DRAM self-refresh mode.
* Send auto refresh command for DRAM refresh.
*/
for (i = 0; i < 128; i++) {
for (chip = 0; chip < mem->chips_to_configure; chip++) {
writel(DIRECT_CMD_REFA |
(chip << DIRECT_CMD_CHIP_SHIFT),
&drex0->directcmd);
writel(DIRECT_CMD_REFA |
(chip << DIRECT_CMD_CHIP_SHIFT),
&drex1->directcmd);
}
}
}
if (mem->gate_leveling_enable) {
writel(PHY_CON0_RESET_VAL, &phy0_ctrl->phy_con0);
writel(PHY_CON0_RESET_VAL, &phy1_ctrl->phy_con0);
setbits_le32(&phy0_ctrl->phy_con0, P0_CMD_EN);
setbits_le32(&phy1_ctrl->phy_con0, P0_CMD_EN);
val = PHY_CON2_RESET_VAL;
val |= INIT_DESKEW_EN;
writel(val, &phy0_ctrl->phy_con2);
writel(val, &phy1_ctrl->phy_con2);
val = readl(&phy0_ctrl->phy_con1);
val |= (RDLVL_PASS_ADJ_VAL << RDLVL_PASS_ADJ_OFFSET);
writel(val, &phy0_ctrl->phy_con1);
val = readl(&phy1_ctrl->phy_con1);
val |= (RDLVL_PASS_ADJ_VAL << RDLVL_PASS_ADJ_OFFSET);
writel(val, &phy1_ctrl->phy_con1);
n_lock_w_phy0 = (lock0_info & CTRL_LOCK_COARSE_MASK) >> 2;
n_lock_r = readl(&phy0_ctrl->phy_con12);
n_lock_r &= ~CTRL_DLL_ON;
n_lock_r |= n_lock_w_phy0;
writel(n_lock_r, &phy0_ctrl->phy_con12);
n_lock_w_phy1 = (lock1_info & CTRL_LOCK_COARSE_MASK) >> 2;
n_lock_r = readl(&phy1_ctrl->phy_con12);
n_lock_r &= ~CTRL_DLL_ON;
n_lock_r |= n_lock_w_phy1;
writel(n_lock_r, &phy1_ctrl->phy_con12);
val = (0x3 << DIRECT_CMD_BANK_SHIFT) | 0x4;
for (chip = 0; chip < mem->chips_to_configure; chip++) {
writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
&drex0->directcmd);
writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
&drex1->directcmd);
}
setbits_le32(&phy0_ctrl->phy_con2, RDLVL_GATE_EN);
setbits_le32(&phy1_ctrl->phy_con2, RDLVL_GATE_EN);
setbits_le32(&phy0_ctrl->phy_con0, CTRL_SHGATE);
setbits_le32(&phy1_ctrl->phy_con0, CTRL_SHGATE);
val = readl(&phy0_ctrl->phy_con1);
val &= ~(CTRL_GATEDURADJ_MASK);
writel(val, &phy0_ctrl->phy_con1);
val = readl(&phy1_ctrl->phy_con1);
val &= ~(CTRL_GATEDURADJ_MASK);
writel(val, &phy1_ctrl->phy_con1);
writel(CTRL_RDLVL_GATE_ENABLE, &drex0->rdlvl_config);
i = TIMEOUT;
while (((readl(&drex0->phystatus) & RDLVL_COMPLETE_CHO) !=
RDLVL_COMPLETE_CHO) && (i > 0)) {
/*
* TODO(waihong): Comment on how long this take to
* timeout
*/
sdelay(100);
i--;
}
if (!i)
return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;
writel(CTRL_RDLVL_GATE_DISABLE, &drex0->rdlvl_config);
writel(CTRL_RDLVL_GATE_ENABLE, &drex1->rdlvl_config);
i = TIMEOUT;
while (((readl(&drex1->phystatus) & RDLVL_COMPLETE_CHO) !=
RDLVL_COMPLETE_CHO) && (i > 0)) {
/*
* TODO(waihong): Comment on how long this take to
* timeout
*/
sdelay(100);
i--;
}
if (!i)
return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;
writel(CTRL_RDLVL_GATE_DISABLE, &drex1->rdlvl_config);
writel(0, &phy0_ctrl->phy_con14);
writel(0, &phy1_ctrl->phy_con14);
val = (0x3 << DIRECT_CMD_BANK_SHIFT);
for (chip = 0; chip < mem->chips_to_configure; chip++) {
writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
&drex0->directcmd);
writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
&drex1->directcmd);
}
/* Common Settings for Leveling */
val = PHY_CON12_RESET_VAL;
writel((val + n_lock_w_phy0), &phy0_ctrl->phy_con12);
writel((val + n_lock_w_phy1), &phy1_ctrl->phy_con12);
setbits_le32(&phy0_ctrl->phy_con2, DLL_DESKEW_EN);
setbits_le32(&phy1_ctrl->phy_con2, DLL_DESKEW_EN);
}
/* Send PALL command */
dmc_config_prech(mem, &drex0->directcmd);
dmc_config_prech(mem, &drex1->directcmd);
writel(mem->memcontrol, &drex0->memcontrol);
writel(mem->memcontrol, &drex1->memcontrol);
/*
* Set DMC Concontrol: Enable auto-refresh counter, provide
* read data fetch cycles and enable DREX auto set powerdown
* for input buffer of I/O in none read memory state.
*/
writel(mem->concontrol | (mem->aref_en << CONCONTROL_AREF_EN_SHIFT) |
(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)|
DMC_CONCONTROL_IO_PD_CON(0x2),
&drex0->concontrol);
writel(mem->concontrol | (mem->aref_en << CONCONTROL_AREF_EN_SHIFT) |
(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)|
DMC_CONCONTROL_IO_PD_CON(0x2),
&drex1->concontrol);
/*
* Enable Clock Gating Control for DMC
* this saves around 25 mw dmc power as compared to the power
* consumption without these bits enabled
*/
setbits_le32(&drex0->cgcontrol, DMC_INTERNAL_CG);
setbits_le32(&drex1->cgcontrol, DMC_INTERNAL_CG);
return 0;
}
#endif
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