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nest-open-source / manifest_repos / bootloader / 6bfdac06e51797a9d969343386055eb7a77616bb / . / drivers / ddr / marvell / axp / ddr3_dfs.c
blob: 934777368aa120de38b204e0f4902b99c90d9e9d [file] [log] [blame]
/*
* Copyright (C) Marvell International Ltd. and its affiliates
*
* SPDX-License-Identifier: GPL-2.0
*/
#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_hw_training.h"
/*
* Debug
*/
#define DEBUG_DFS_C(s, d, l) \
DEBUG_DFS_S(s); DEBUG_DFS_D(d, l); DEBUG_DFS_S("\n")
#define DEBUG_DFS_FULL_C(s, d, l) \
DEBUG_DFS_FULL_S(s); DEBUG_DFS_FULL_D(d, l); DEBUG_DFS_FULL_S("\n")
#ifdef MV_DEBUG_DFS
#define DEBUG_DFS_S(s) puts(s)
#define DEBUG_DFS_D(d, l) printf("%x", d)
#else
#define DEBUG_DFS_S(s)
#define DEBUG_DFS_D(d, l)
#endif
#ifdef MV_DEBUG_DFS_FULL
#define DEBUG_DFS_FULL_S(s) puts(s)
#define DEBUG_DFS_FULL_D(d, l) printf("%x", d)
#else
#define DEBUG_DFS_FULL_S(s)
#define DEBUG_DFS_FULL_D(d, l)
#endif
#if defined(MV88F672X)
extern u8 div_ratio[CLK_VCO][CLK_DDR];
extern void get_target_freq(u32 freq_mode, u32 *ddr_freq, u32 *hclk_ps);
#else
extern u16 odt_dynamic[ODT_OPT][MAX_CS];
extern u8 div_ratio1to1[CLK_CPU][CLK_DDR];
extern u8 div_ratio2to1[CLK_CPU][CLK_DDR];
#endif
extern u16 odt_static[ODT_OPT][MAX_CS];
extern u32 cpu_fab_clk_to_hclk[FAB_OPT][CLK_CPU];
extern u32 ddr3_get_vco_freq(void);
u32 ddr3_get_freq_parameter(u32 target_freq, int ratio_2to1);
#ifdef MV_DEBUG_DFS
static inline void dfs_reg_write(u32 addr, u32 val)
{
printf("\n write reg 0x%08x = 0x%08x", addr, val);
writel(val, INTER_REGS_BASE + addr);
}
#else
static inline void dfs_reg_write(u32 addr, u32 val)
{
writel(val, INTER_REGS_BASE + addr);
}
#endif
static void wait_refresh_op_complete(void)
{
u32 reg;
/* Poll - Wait for Refresh operation completion */
do {
reg = reg_read(REG_SDRAM_OPERATION_ADDR) &
REG_SDRAM_OPERATION_CMD_RFRS_DONE;
} while (reg); /* Wait for '0' */
}
/*
* Name: ddr3_get_freq_parameter
* Desc: Finds CPU/DDR frequency ratio according to Sample@reset and table.
* Args: target_freq - target frequency
* Notes:
* Returns: freq_par - the ratio parameter
*/
u32 ddr3_get_freq_parameter(u32 target_freq, int ratio_2to1)
{
u32 ui_vco_freq, freq_par;
ui_vco_freq = ddr3_get_vco_freq();
#if defined(MV88F672X)
freq_par = div_ratio[ui_vco_freq][target_freq];
#else
/* Find the ratio between PLL frequency and ddr-clk */
if (ratio_2to1)
freq_par = div_ratio2to1[ui_vco_freq][target_freq];
else
freq_par = div_ratio1to1[ui_vco_freq][target_freq];
#endif
return freq_par;
}
/*
* Name: ddr3_dfs_high_2_low
* Desc:
* Args: freq - target frequency
* Notes:
* Returns: MV_OK - success, MV_FAIL - fail
*/
int ddr3_dfs_high_2_low(u32 freq, MV_DRAM_INFO *dram_info)
{
#if defined(MV88F78X60) || defined(MV88F672X)
/* This Flow is relevant for ArmadaXP A0 */
u32 reg, freq_par, tmp;
u32 cs = 0;
DEBUG_DFS_C("DDR3 - DFS - High To Low - Starting DFS procedure to Frequency - ",
freq, 1);
/* target frequency - 100MHz */
freq_par = ddr3_get_freq_parameter(freq, 0);
#if defined(MV88F672X)
u32 hclk;
u32 cpu_freq = ddr3_get_cpu_freq();
get_target_freq(cpu_freq, &tmp, &hclk);
#endif
/* Configure - DRAM DLL final state after DFS is complete - Enable */
reg = reg_read(REG_DFS_ADDR);
/* [0] - DfsDllNextState - Disable */
reg |= (1 << REG_DFS_DLLNEXTSTATE_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Configure - XBAR Retry response during Block to enable internal
* access - Disable
*/
reg = reg_read(REG_METAL_MASK_ADDR);
/* [0] - RetryMask - Disable */
reg &= ~(1 << REG_METAL_MASK_RETRY_OFFS);
/* 0x14B0 - Dunit MMask Register */
dfs_reg_write(REG_METAL_MASK_ADDR, reg);
/* Configure - Block new external transactions - Enable */
reg = reg_read(REG_DFS_ADDR);
reg |= (1 << REG_DFS_BLOCK_OFFS); /* [1] - DfsBlock - Enable */
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* Registered DIMM support */
if (dram_info->reg_dimm) {
/*
* Configure - Disable Register DIMM CKE Power
* Down mode - CWA_RC
*/
reg = (0x9 & REG_SDRAM_OPERATION_CWA_RC_MASK) <<
REG_SDRAM_OPERATION_CWA_RC_OFFS;
/*
* Configure - Disable Register DIMM CKE Power
* Down mode - CWA_DATA
*/
reg |= ((0 & REG_SDRAM_OPERATION_CWA_DATA_MASK) <<
REG_SDRAM_OPERATION_CWA_DATA_OFFS);
/*
* Configure - Disable Register DIMM CKE Power
* Down mode - Set Delay - tMRD
*/
reg |= (0 << REG_SDRAM_OPERATION_CWA_DELAY_SEL_OFFS);
/* Configure - Issue CWA command with the above parameters */
reg |= (REG_SDRAM_OPERATION_CMD_CWA &
~(0xF << REG_SDRAM_OPERATION_CS_OFFS));
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for CWA operation completion */
do {
reg = reg_read(REG_SDRAM_OPERATION_ADDR) &
(REG_SDRAM_OPERATION_CMD_MASK);
} while (reg);
/* Configure - Disable outputs floating during Self Refresh */
reg = reg_read(REG_REGISTERED_DRAM_CTRL_ADDR);
/* [15] - SRFloatEn - Disable */
reg &= ~(1 << REG_REGISTERED_DRAM_CTRL_SR_FLOAT_OFFS);
/* 0x16D0 - DDR3 Registered DRAM Control */
dfs_reg_write(REG_REGISTERED_DRAM_CTRL_ADDR, reg);
}
/* Optional - Configure - DDR3_Rtt_nom_CS# */
for (cs = 0; cs < MAX_CS; cs++) {
if (dram_info->cs_ena & (1 << cs)) {
reg = reg_read(REG_DDR3_MR1_CS_ADDR +
(cs << MR_CS_ADDR_OFFS));
reg &= REG_DDR3_MR1_RTT_MASK;
dfs_reg_write(REG_DDR3_MR1_CS_ADDR +
(cs << MR_CS_ADDR_OFFS), reg);
}
}
/* Configure - Move DRAM into Self Refresh */
reg = reg_read(REG_DFS_ADDR);
reg |= (1 << REG_DFS_SR_OFFS); /* [2] - DfsSR - Enable */
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* Poll - Wait for Self Refresh indication */
do {
reg = ((reg_read(REG_DFS_ADDR)) & (1 << REG_DFS_ATSR_OFFS));
} while (reg == 0x0); /* 0x1528 [3] - DfsAtSR - Wait for '1' */
/* Start of clock change procedure (PLL) */
#if defined(MV88F672X)
/* avantaLP */
/* Configure cpupll_clkdiv_reset_mask */
reg = reg_read(CPU_PLL_CLOCK_DIVIDER_CNTRL0);
reg &= CPU_PLL_CLOCK_DIVIDER_CNTRL0_MASK;
/* 0xE8264[7:0] 0xff CPU Clock Dividers Reset mask */
dfs_reg_write(CPU_PLL_CLOCK_DIVIDER_CNTRL0, (reg + 0xFF));
/* Configure cpu_clkdiv_reload_smooth */
reg = reg_read(CPU_PLL_CNTRL0);
reg &= CPU_PLL_CNTRL0_RELOAD_SMOOTH_MASK;
/* 0xE8260 [15:8] 0x2 CPU Clock Dividers Reload Smooth enable */
dfs_reg_write(CPU_PLL_CNTRL0,
(reg + (2 << CPU_PLL_CNTRL0_RELOAD_SMOOTH_OFFS)));
/* Configure cpupll_clkdiv_relax_en */
reg = reg_read(CPU_PLL_CNTRL0);
reg &= CPU_PLL_CNTRL0_RELAX_EN_MASK;
/* 0xE8260 [31:24] 0x2 Relax Enable */
dfs_reg_write(CPU_PLL_CNTRL0,
(reg + (2 << CPU_PLL_CNTRL0_RELAX_EN_OFFS)));
/* Configure cpupll_clkdiv_ddr_clk_ratio */
reg = reg_read(CPU_PLL_CLOCK_DIVIDER_CNTRL1);
/*
* 0xE8268 [13:8] N Set Training clock:
* APLL Out Clock (VCO freq) / N = 100 MHz
*/
reg &= CPU_PLL_CLOCK_DIVIDER_CNTRL1_MASK;
reg |= (freq_par << 8); /* full Integer ratio from PLL-out to ddr-clk */
dfs_reg_write(CPU_PLL_CLOCK_DIVIDER_CNTRL1, reg);
/* Configure cpupll_clkdiv_reload_ratio */
reg = reg_read(CPU_PLL_CLOCK_DIVIDER_CNTRL0);
reg &= CPU_PLL_CLOCK_RELOAD_RATIO_MASK;
/* 0xE8264 [8]=0x1 CPU Clock Dividers Reload Ratio trigger set */
dfs_reg_write(CPU_PLL_CLOCK_DIVIDER_CNTRL0,
(reg + (1 << CPU_PLL_CLOCK_RELOAD_RATIO_OFFS)));
udelay(1);
/* Configure cpupll_clkdiv_reload_ratio */
reg = reg_read(CPU_PLL_CLOCK_DIVIDER_CNTRL0);
reg &= CPU_PLL_CLOCK_RELOAD_RATIO_MASK;
/* 0xE8264 [8]=0x0 CPU Clock Dividers Reload Ratio trigger clear */
dfs_reg_write(CPU_PLL_CLOCK_DIVIDER_CNTRL0, reg);
udelay(5);
#else
/*
* Initial Setup - assure that the "load new ratio" is clear (bit 24)
* and in the same chance, block reassertions of reset [15:8] and
* force reserved bits[7:0].
*/
reg = 0x0000FDFF;
/* 0x18700 - CPU Div CLK control 0 */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
/*
* RelaX whenever reset is asserted to that channel
* (good for any case)
*/
reg = 0x0000FF00;
/* 0x18704 - CPU Div CLK control 0 */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_1_ADDR, reg);
reg = reg_read(REG_CPU_DIV_CLK_CTRL_2_ADDR) &
REG_CPU_DIV_CLK_CTRL_3_FREQ_MASK;
/* full Integer ratio from PLL-out to ddr-clk */
reg |= (freq_par << REG_CPU_DIV_CLK_CTRL_3_FREQ_OFFS);
/* 0x1870C - CPU Div CLK control 3 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_2_ADDR, reg);
/*
* Shut off clock enable to the DDRPHY clock channel (this is the "D").
* All the rest are kept as is (forced, but could be read-modify-write).
* This is done now by RMW above.
*/
/* Clock is not shut off gracefully - keep it running */
reg = 0x000FFF02;
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_4_ADDR, reg);
/* Wait before replacing the clock on the DDR Phy Channel. */
udelay(1);
/*
* This for triggering the frequency update. Bit[24] is the
* central control
* bits [23:16] == which channels to change ==2 ==>
* only DDR Phy (smooth transition)
* bits [15:8] == mask reset reassertion due to clock modification
* to these channels.
* bits [7:0] == not in use
*/
reg = 0x0102FDFF;
/* 0x18700 - CPU Div CLK control 0 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
udelay(1); /* Wait 1usec */
/*
* Poll Div CLK status 0 register - indication that the clocks
* are active - 0x18718 [8]
*/
do {
reg = (reg_read(REG_CPU_DIV_CLK_STATUS_0_ADDR)) &
(1 << REG_CPU_DIV_CLK_ALL_STABLE_OFFS);
} while (reg == 0);
/*
* Clean the CTRL0, to be ready for next resets and next requests
* of ratio modifications.
*/
reg = 0x000000FF;
/* 0x18700 - CPU Div CLK control 0 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
udelay(5);
#endif
/* End of clock change procedure (PLL) */
/* Configure - Select normal clock for the DDR PHY - Enable */
reg = reg_read(REG_DRAM_INIT_CTRL_STATUS_ADDR);
/* [16] - ddr_phy_trn_clk_sel - Enable */
reg |= (1 << REG_DRAM_INIT_CTRL_TRN_CLK_OFFS);
/* 0x18488 - DRAM Init control status register */
dfs_reg_write(REG_DRAM_INIT_CTRL_STATUS_ADDR, reg);
/* Configure - Set Correct Ratio - 1:1 */
/* [15] - Phy2UnitClkRatio = 0 - Set 1:1 Ratio between Dunit and Phy */
reg = reg_read(REG_DDR_IO_ADDR) & ~(1 << REG_DDR_IO_CLK_RATIO_OFFS);
dfs_reg_write(REG_DDR_IO_ADDR, reg); /* 0x1524 - DDR IO Register */
/* Configure - 2T Mode - Restore original configuration */
reg = reg_read(REG_DUNIT_CTRL_LOW_ADDR);
/* [3:4] 2T - 1T Mode - low freq */
reg &= ~(REG_DUNIT_CTRL_LOW_2T_MASK << REG_DUNIT_CTRL_LOW_2T_OFFS);
/* 0x1404 - DDR Controller Control Low Register */
dfs_reg_write(REG_DUNIT_CTRL_LOW_ADDR, reg);
/* Configure - Restore CL and CWL - MRS Commands */
reg = reg_read(REG_DFS_ADDR);
reg &= ~(REG_DFS_CL_NEXT_STATE_MASK << REG_DFS_CL_NEXT_STATE_OFFS);
reg &= ~(REG_DFS_CWL_NEXT_STATE_MASK << REG_DFS_CWL_NEXT_STATE_OFFS);
/* [8] - DfsCLNextState - MRS CL=6 after DFS (due to DLL-off mode) */
reg |= (0x4 << REG_DFS_CL_NEXT_STATE_OFFS);
/* [12] - DfsCWLNextState - MRS CWL=6 after DFS (due to DLL-off mode) */
reg |= (0x1 << REG_DFS_CWL_NEXT_STATE_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* Poll - Wait for APLL + ADLLs lock on new frequency */
do {
reg = (reg_read(REG_PHY_LOCK_STATUS_ADDR)) &
REG_PHY_LOCK_APLL_ADLL_STATUS_MASK;
/* 0x1674 [10:0] - Phy lock status Register */
} while (reg != REG_PHY_LOCK_APLL_ADLL_STATUS_MASK);
/* Configure - Reset the PHY Read FIFO and Write channels - Set Reset */
reg = (reg_read(REG_SDRAM_CONFIG_ADDR) & REG_SDRAM_CONFIG_MASK);
/* [30:29] = 0 - Data Pup R/W path reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
/*
* Configure - DRAM Data PHY Read [30], Write [29] path
* reset - Release Reset
*/
reg = (reg_read(REG_SDRAM_CONFIG_ADDR) | ~REG_SDRAM_CONFIG_MASK);
/* [30:29] = '11' - Data Pup R/W path reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
/* Registered DIMM support */
if (dram_info->reg_dimm) {
/*
* Configure - Change register DRAM operating speed
* (below 400MHz) - CWA_RC
*/
reg = (0xA & REG_SDRAM_OPERATION_CWA_RC_MASK) <<
REG_SDRAM_OPERATION_CWA_RC_OFFS;
/*
* Configure - Change register DRAM operating speed
* (below 400MHz) - CWA_DATA
*/
reg |= ((0x0 & REG_SDRAM_OPERATION_CWA_DATA_MASK) <<
REG_SDRAM_OPERATION_CWA_DATA_OFFS);
/* Configure - Set Delay - tSTAB */
reg |= (0x1 << REG_SDRAM_OPERATION_CWA_DELAY_SEL_OFFS);
/* Configure - Issue CWA command with the above parameters */
reg |= (REG_SDRAM_OPERATION_CMD_CWA &
~(0xF << REG_SDRAM_OPERATION_CS_OFFS));
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for CWA operation completion */
do {
reg = reg_read(REG_SDRAM_OPERATION_ADDR) &
(REG_SDRAM_OPERATION_CMD_MASK);
} while (reg);
}
/* Configure - Exit Self Refresh */
/* [2] - DfsSR */
reg = (reg_read(REG_DFS_ADDR) & ~(1 << REG_DFS_SR_OFFS));
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Poll - DFS Register - 0x1528 [3] - DfsAtSR - All DRAM devices
* on all ranks are NOT in self refresh mode
*/
do {
reg = ((reg_read(REG_DFS_ADDR)) & (1 << REG_DFS_ATSR_OFFS));
} while (reg); /* Wait for '0' */
/* Configure - Issue Refresh command */
/* [3-0] = 0x2 - Refresh Command, [11-8] - enabled Cs */
reg = REG_SDRAM_OPERATION_CMD_RFRS;
for (cs = 0; cs < MAX_CS; cs++) {
if (dram_info->cs_ena & (1 << cs))
reg &= ~(1 << (REG_SDRAM_OPERATION_CS_OFFS + cs));
}
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for Refresh operation completion */
wait_refresh_op_complete();
/* Configure - Block new external transactions - Disable */
reg = reg_read(REG_DFS_ADDR);
reg &= ~(1 << REG_DFS_BLOCK_OFFS); /* [1] - DfsBlock - Disable */
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Configure - XBAR Retry response during Block to enable
* internal access - Disable
*/
reg = reg_read(REG_METAL_MASK_ADDR);
/* [0] - RetryMask - Enable */
reg |= (1 << REG_METAL_MASK_RETRY_OFFS);
/* 0x14B0 - Dunit MMask Register */
dfs_reg_write(REG_METAL_MASK_ADDR, reg);
for (cs = 0; cs < MAX_CS; cs++) {
if (dram_info->cs_ena & (1 << cs)) {
/* Configure - Set CL */
reg = reg_read(REG_DDR3_MR0_CS_ADDR +
(cs << MR_CS_ADDR_OFFS)) &
~REG_DDR3_MR0_CL_MASK;
tmp = 0x4; /* CL=6 - 0x4 */
reg |= ((tmp & 0x1) << REG_DDR3_MR0_CL_OFFS);
reg |= ((tmp & 0xE) << REG_DDR3_MR0_CL_HIGH_OFFS);
dfs_reg_write(REG_DDR3_MR0_CS_ADDR +
(cs << MR_CS_ADDR_OFFS), reg);
/* Configure - Set CWL */
reg = reg_read(REG_DDR3_MR2_CS_ADDR +
(cs << MR_CS_ADDR_OFFS))
& ~(REG_DDR3_MR2_CWL_MASK << REG_DDR3_MR2_CWL_OFFS);
/* CWL=6 - 0x1 */
reg |= ((0x1) << REG_DDR3_MR2_CWL_OFFS);
dfs_reg_write(REG_DDR3_MR2_CS_ADDR +
(cs << MR_CS_ADDR_OFFS), reg);
}
}
DEBUG_DFS_C("DDR3 - DFS - High To Low - Ended successfuly - new Frequency - ",
freq, 1);
return MV_OK;
#else
/* This Flow is relevant for Armada370 A0 and ArmadaXP Z1 */
u32 reg, freq_par;
u32 cs = 0;
DEBUG_DFS_C("DDR3 - DFS - High To Low - Starting DFS procedure to Frequency - ",
freq, 1);
/* target frequency - 100MHz */
freq_par = ddr3_get_freq_parameter(freq, 0);
reg = 0x0000FF00;
/* 0x18700 - CPU Div CLK control 0 */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_1_ADDR, reg);
/* 0x1600 - ODPG_CNTRL_Control */
reg = reg_read(REG_ODPG_CNTRL_ADDR);
/* [21] = 1 - auto refresh disable */
reg |= (1 << REG_ODPG_CNTRL_OFFS);
dfs_reg_write(REG_ODPG_CNTRL_ADDR, reg);
/* 0x1670 - PHY lock mask register */
reg = reg_read(REG_PHY_LOCK_MASK_ADDR);
reg &= REG_PHY_LOCK_MASK_MASK; /* [11:0] = 0 */
dfs_reg_write(REG_PHY_LOCK_MASK_ADDR, reg);
reg = reg_read(REG_DFS_ADDR); /* 0x1528 - DFS register */
/* Disable reconfig */
reg &= ~0x10; /* [4] - Enable reconfig MR registers after DFS_ERG */
reg |= 0x1; /* [0] - DRAM DLL disabled after DFS */
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
reg = reg_read(REG_METAL_MASK_ADDR) & ~(1 << 0); /* [0] - disable */
/* 0x14B0 - Dunit MMask Register */
dfs_reg_write(REG_METAL_MASK_ADDR, reg);
/* [1] - DFS Block enable */
reg = reg_read(REG_DFS_ADDR) | (1 << REG_DFS_BLOCK_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* [2] - DFS Self refresh enable */
reg = reg_read(REG_DFS_ADDR) | (1 << REG_DFS_SR_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Poll DFS Register - 0x1528 [3] - DfsAtSR -
* All DRAM devices on all ranks are in self refresh mode -
* DFS can be executed afterwards
*/
do {
reg = reg_read(REG_DFS_ADDR) & (1 << REG_DFS_ATSR_OFFS);
} while (reg == 0x0); /* Wait for '1' */
/* Disable ODT on DLL-off mode */
dfs_reg_write(REG_SDRAM_ODT_CTRL_HIGH_ADDR,
REG_SDRAM_ODT_CTRL_HIGH_OVRD_MASK);
/* [11:0] = 0 */
reg = (reg_read(REG_PHY_LOCK_MASK_ADDR) & REG_PHY_LOCK_MASK_MASK);
/* 0x1670 - PHY lock mask register */
dfs_reg_write(REG_PHY_LOCK_MASK_ADDR, reg);
/* Add delay between entering SR and start ratio modification */
udelay(1);
/*
* Initial Setup - assure that the "load new ratio" is clear (bit 24)
* and in the same chance, block reassertions of reset [15:8] and
* force reserved bits[7:0].
*/
reg = 0x0000FDFF;
/* 0x18700 - CPU Div CLK control 0 */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
/*
* RelaX whenever reset is asserted to that channel (good for any case)
*/
reg = 0x0000FF00;
/* 0x18700 - CPU Div CLK control 0 */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_1_ADDR, reg);
reg = reg_read(REG_CPU_DIV_CLK_CTRL_3_ADDR) &
REG_CPU_DIV_CLK_CTRL_3_FREQ_MASK;
/* Full Integer ratio from PLL-out to ddr-clk */
reg |= (freq_par << REG_CPU_DIV_CLK_CTRL_3_FREQ_OFFS);
/* 0x1870C - CPU Div CLK control 3 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_3_ADDR, reg);
/*
* Shut off clock enable to the DDRPHY clock channel (this is the "D").
* All the rest are kept as is (forced, but could be read-modify-write).
* This is done now by RMW above.
*/
/* Clock is not shut off gracefully - keep it running */
reg = 0x000FFF02;
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_4_ADDR, reg);
/* Wait before replacing the clock on the DDR Phy Channel. */
udelay(1);
/*
* This for triggering the frequency update. Bit[24] is the
* central control
* bits [23:16] == which channels to change ==2 ==> only DDR Phy
* (smooth transition)
* bits [15:8] == mask reset reassertion due to clock modification
* to these channels.
* bits [7:0] == not in use
*/
reg = 0x0102FDFF;
/* 0x18700 - CPU Div CLK control 0 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
udelay(1); /* Wait 1usec */
/*
* Poll Div CLK status 0 register - indication that the clocks
* are active - 0x18718 [8]
*/
do {
reg = (reg_read(REG_CPU_DIV_CLK_STATUS_0_ADDR)) &
(1 << REG_CPU_DIV_CLK_ALL_STABLE_OFFS);
} while (reg == 0);
/*
* Clean the CTRL0, to be ready for next resets and next requests of
* ratio modifications.
*/
reg = 0x000000FF;
/* 0x18700 - CPU Div CLK control 0 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
udelay(5);
/* Switch HCLK Mux to training clk (100Mhz), keep DFS request bit */
reg = 0x20050000;
/* 0x18488 - DRAM Init control status register */
dfs_reg_write(REG_DRAM_INIT_CTRL_STATUS_ADDR, reg);
reg = reg_read(REG_DDR_IO_ADDR) & ~(1 << REG_DDR_IO_CLK_RATIO_OFFS);
/* [15] = 0 - Set 1:1 Ratio between Dunit and Phy */
dfs_reg_write(REG_DDR_IO_ADDR, reg); /* 0x1524 - DDR IO Regist */
reg = reg_read(REG_DRAM_PHY_CONFIG_ADDR) & REG_DRAM_PHY_CONFIG_MASK;
/* [31:30]] - reset pup data ctrl ADLL */
/* 0x15EC - DRAM PHY Config register */
dfs_reg_write(REG_DRAM_PHY_CONFIG_ADDR, reg);
reg = (reg_read(REG_DRAM_PHY_CONFIG_ADDR) | ~REG_DRAM_PHY_CONFIG_MASK);
/* [31:30] - normal pup data ctrl ADLL */
/* 0x15EC - DRAM PHY Config register */
dfs_reg_write(REG_DRAM_PHY_CONFIG_ADDR, reg);
udelay(1); /* Wait 1usec */
/* 0x1404 */
reg = (reg_read(REG_DUNIT_CTRL_LOW_ADDR) & 0xFFFFFFE7);
dfs_reg_write(REG_DUNIT_CTRL_LOW_ADDR, reg);
/* Poll Phy lock status register - APLL lock indication - 0x1674 */
do {
reg = (reg_read(REG_PHY_LOCK_STATUS_ADDR)) &
REG_PHY_LOCK_STATUS_LOCK_MASK;
} while (reg != REG_PHY_LOCK_STATUS_LOCK_MASK); /* Wait for '0xFFF' */
reg = (reg_read(REG_SDRAM_CONFIG_ADDR) & REG_SDRAM_CONFIG_MASK);
/* [30:29] = 0 - Data Pup R/W path reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
reg = reg_read(REG_SDRAM_CONFIG_ADDR) | ~REG_SDRAM_CONFIG_MASK;
/* [30:29] = '11' - Data Pup R/W path reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
udelay(1000); /* Wait 1msec */
for (cs = 0; cs < MAX_CS; cs++) {
if (dram_info->cs_ena & (1 << cs)) {
/* Poll - Wait for Refresh operation completion */
wait_refresh_op_complete();
/* Config CL and CWL with MR0 and MR2 registers */
reg = reg_read(REG_DDR3_MR0_ADDR);
reg &= ~0x74; /* CL [3:0]; [6:4],[2] */
reg |= (1 << 5); /* CL = 4, CAS is 6 */
dfs_reg_write(REG_DDR3_MR0_ADDR, reg);
reg = REG_SDRAM_OPERATION_CMD_MR0 &
~(1 << (REG_SDRAM_OPERATION_CS_OFFS + cs));
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for Refresh operation completion */
wait_refresh_op_complete();
reg = reg_read(REG_DDR3_MR2_ADDR);
reg &= ~0x38; /* CWL [5:3] */
reg |= (1 << 3); /* CWL = 1, CWL is 6 */
dfs_reg_write(REG_DDR3_MR2_ADDR, reg);
reg = REG_SDRAM_OPERATION_CMD_MR2 &
~(1 << (REG_SDRAM_OPERATION_CS_OFFS + cs));
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for Refresh operation completion */
wait_refresh_op_complete();
/* Set current rd_sample_delay */
reg = reg_read(REG_READ_DATA_SAMPLE_DELAYS_ADDR);
reg &= ~(REG_READ_DATA_SAMPLE_DELAYS_MASK <<
(REG_READ_DATA_SAMPLE_DELAYS_OFFS * cs));
reg |= (5 << (REG_READ_DATA_SAMPLE_DELAYS_OFFS * cs));
dfs_reg_write(REG_READ_DATA_SAMPLE_DELAYS_ADDR, reg);
/* Set current rd_ready_delay */
reg = reg_read(REG_READ_DATA_READY_DELAYS_ADDR);
reg &= ~(REG_READ_DATA_READY_DELAYS_MASK <<
(REG_READ_DATA_READY_DELAYS_OFFS * cs));
reg |= ((6) << (REG_READ_DATA_READY_DELAYS_OFFS * cs));
dfs_reg_write(REG_READ_DATA_READY_DELAYS_ADDR, reg);
}
}
/* [2] - DFS Self refresh disable */
reg = reg_read(REG_DFS_ADDR) & ~(1 << REG_DFS_SR_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* [1] - DFS Block enable */
reg = reg_read(REG_DFS_ADDR) & ~(1 << REG_DFS_BLOCK_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Poll DFS Register - 0x1528 [3] - DfsAtSR -
* All DRAM devices on all ranks are in self refresh mode - DFS can
* be executed afterwards
*/
do {
reg = reg_read(REG_DFS_ADDR) & (1 << REG_DFS_ATSR_OFFS);
} while (reg); /* Wait for '1' */
reg = (reg_read(REG_METAL_MASK_ADDR) | (1 << 0));
/* [0] - Enable Dunit to crossbar retry */
/* 0x14B0 - Dunit MMask Register */
dfs_reg_write(REG_METAL_MASK_ADDR, reg);
/* 0x1600 - PHY lock mask register */
reg = reg_read(REG_ODPG_CNTRL_ADDR);
reg &= ~(1 << REG_ODPG_CNTRL_OFFS); /* [21] = 0 */
dfs_reg_write(REG_ODPG_CNTRL_ADDR, reg);
/* 0x1670 - PHY lock mask register */
reg = reg_read(REG_PHY_LOCK_MASK_ADDR);
reg |= ~REG_PHY_LOCK_MASK_MASK; /* [11:0] = FFF */
dfs_reg_write(REG_PHY_LOCK_MASK_ADDR, reg);
DEBUG_DFS_C("DDR3 - DFS - High To Low - Ended successfuly - new Frequency - ",
freq, 1);
return MV_OK;
#endif
}
/*
* Name: ddr3_dfs_low_2_high
* Desc:
* Args: freq - target frequency
* Notes:
* Returns: MV_OK - success, MV_FAIL - fail
*/
int ddr3_dfs_low_2_high(u32 freq, int ratio_2to1, MV_DRAM_INFO *dram_info)
{
#if defined(MV88F78X60) || defined(MV88F672X)
/* This Flow is relevant for ArmadaXP A0 */
u32 reg, freq_par, tmp;
u32 cs = 0;
DEBUG_DFS_C("DDR3 - DFS - Low To High - Starting DFS procedure to Frequency - ",
freq, 1);
/* target frequency - freq */
freq_par = ddr3_get_freq_parameter(freq, ratio_2to1);
#if defined(MV88F672X)
u32 hclk;
u32 cpu_freq = ddr3_get_cpu_freq();
get_target_freq(cpu_freq, &tmp, &hclk);
#endif
/* Configure - DRAM DLL final state after DFS is complete - Enable */
reg = reg_read(REG_DFS_ADDR);
/* [0] - DfsDllNextState - Enable */
reg &= ~(1 << REG_DFS_DLLNEXTSTATE_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Configure - XBAR Retry response during Block to enable
* internal access - Disable
*/
reg = reg_read(REG_METAL_MASK_ADDR);
/* [0] - RetryMask - Disable */
reg &= ~(1 << REG_METAL_MASK_RETRY_OFFS);
/* 0x14B0 - Dunit MMask Register */
dfs_reg_write(REG_METAL_MASK_ADDR, reg);
/* Configure - Block new external transactions - Enable */
reg = reg_read(REG_DFS_ADDR);
reg |= (1 << REG_DFS_BLOCK_OFFS); /* [1] - DfsBlock - Enable */
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* Configure - Move DRAM into Self Refresh */
reg = reg_read(REG_DFS_ADDR);
reg |= (1 << REG_DFS_SR_OFFS); /* [2] - DfsSR - Enable */
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* Poll - Wait for Self Refresh indication */
do {
reg = ((reg_read(REG_DFS_ADDR)) & (1 << REG_DFS_ATSR_OFFS));
} while (reg == 0x0); /* 0x1528 [3] - DfsAtSR - Wait for '1' */
/* Start of clock change procedure (PLL) */
#if defined(MV88F672X)
/* avantaLP */
/* Configure cpupll_clkdiv_reset_mask */
reg = reg_read(CPU_PLL_CLOCK_DIVIDER_CNTRL0);
reg &= CPU_PLL_CLOCK_DIVIDER_CNTRL0_MASK;
/* 0xE8264[7:0] 0xff CPU Clock Dividers Reset mask */
dfs_reg_write(CPU_PLL_CLOCK_DIVIDER_CNTRL0, (reg + 0xFF));
/* Configure cpu_clkdiv_reload_smooth */
reg = reg_read(CPU_PLL_CNTRL0);
reg &= CPU_PLL_CNTRL0_RELOAD_SMOOTH_MASK;
/* 0xE8260 [15:8] 0x2 CPU Clock Dividers Reload Smooth enable */
dfs_reg_write(CPU_PLL_CNTRL0,
reg + (2 << CPU_PLL_CNTRL0_RELOAD_SMOOTH_OFFS));
/* Configure cpupll_clkdiv_relax_en */
reg = reg_read(CPU_PLL_CNTRL0);
reg &= CPU_PLL_CNTRL0_RELAX_EN_MASK;
/* 0xE8260 [31:24] 0x2 Relax Enable */
dfs_reg_write(CPU_PLL_CNTRL0,
reg + (2 << CPU_PLL_CNTRL0_RELAX_EN_OFFS));
/* Configure cpupll_clkdiv_ddr_clk_ratio */
reg = reg_read(CPU_PLL_CLOCK_DIVIDER_CNTRL1);
/*
* 0xE8268 [13:8] N Set Training clock:
* APLL Out Clock (VCO freq) / N = 100 MHz
*/
reg &= CPU_PLL_CLOCK_DIVIDER_CNTRL1_MASK;
reg |= (freq_par << 8); /* full Integer ratio from PLL-out to ddr-clk */
dfs_reg_write(CPU_PLL_CLOCK_DIVIDER_CNTRL1, reg);
/* Configure cpupll_clkdiv_reload_ratio */
reg = reg_read(CPU_PLL_CLOCK_DIVIDER_CNTRL0);
reg &= CPU_PLL_CLOCK_RELOAD_RATIO_MASK;
/* 0xE8264 [8]=0x1 CPU Clock Dividers Reload Ratio trigger set */
dfs_reg_write(CPU_PLL_CLOCK_DIVIDER_CNTRL0,
reg + (1 << CPU_PLL_CLOCK_RELOAD_RATIO_OFFS));
udelay(1);
/* Configure cpupll_clkdiv_reload_ratio */
reg = reg_read(CPU_PLL_CLOCK_DIVIDER_CNTRL0);
reg &= CPU_PLL_CLOCK_RELOAD_RATIO_MASK;
/* 0xE8264 [8]=0x0 CPU Clock Dividers Reload Ratio trigger clear */
dfs_reg_write(CPU_PLL_CLOCK_DIVIDER_CNTRL0, reg);
udelay(5);
#else
/*
* Initial Setup - assure that the "load new ratio" is clear (bit 24)
* and in the same chance, block reassertions of reset [15:8]
* and force reserved bits[7:0].
*/
reg = 0x0000FFFF;
/* 0x18700 - CPU Div CLK control 0 */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
/*
* RelaX whenever reset is asserted to that channel (good for any case)
*/
reg = 0x0000FF00;
/* 0x18704 - CPU Div CLK control 0 */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_1_ADDR, reg);
reg = reg_read(REG_CPU_DIV_CLK_CTRL_2_ADDR) &
REG_CPU_DIV_CLK_CTRL_3_FREQ_MASK;
reg |= (freq_par << REG_CPU_DIV_CLK_CTRL_3_FREQ_OFFS);
/* full Integer ratio from PLL-out to ddr-clk */
/* 0x1870C - CPU Div CLK control 3 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_2_ADDR, reg);
/*
* Shut off clock enable to the DDRPHY clock channel (this is the "D").
* All the rest are kept as is (forced, but could be read-modify-write).
* This is done now by RMW above.
*/
reg = 0x000FFF02;
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_4_ADDR, reg);
/* Wait before replacing the clock on the DDR Phy Channel. */
udelay(1);
reg = 0x0102FDFF;
/*
* This for triggering the frequency update. Bit[24] is the
* central control
* bits [23:16] == which channels to change ==2 ==> only DDR Phy
* (smooth transition)
* bits [15:8] == mask reset reassertion due to clock modification
* to these channels.
* bits [7:0] == not in use
*/
/* 0x18700 - CPU Div CLK control 0 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
udelay(1);
/*
* Poll Div CLK status 0 register - indication that the clocks
* are active - 0x18718 [8]
*/
do {
reg = reg_read(REG_CPU_DIV_CLK_STATUS_0_ADDR) &
(1 << REG_CPU_DIV_CLK_ALL_STABLE_OFFS);
} while (reg == 0);
reg = 0x000000FF;
/*
* Clean the CTRL0, to be ready for next resets and next requests
* of ratio modifications.
*/
/* 0x18700 - CPU Div CLK control 0 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
#endif
/* End of clock change procedure (PLL) */
if (ratio_2to1) {
/* Configure - Select normal clock for the DDR PHY - Disable */
reg = reg_read(REG_DRAM_INIT_CTRL_STATUS_ADDR);
/* [16] - ddr_phy_trn_clk_sel - Disable */
reg &= ~(1 << REG_DRAM_INIT_CTRL_TRN_CLK_OFFS);
/* 0x18488 - DRAM Init control status register */
dfs_reg_write(REG_DRAM_INIT_CTRL_STATUS_ADDR, reg);
}
/*
* Configure - Set Correct Ratio - according to target ratio
* parameter - 2:1/1:1
*/
if (ratio_2to1) {
/*
* [15] - Phy2UnitClkRatio = 1 - Set 2:1 Ratio between
* Dunit and Phy
*/
reg = reg_read(REG_DDR_IO_ADDR) |
(1 << REG_DDR_IO_CLK_RATIO_OFFS);
} else {
/*
* [15] - Phy2UnitClkRatio = 0 - Set 1:1 Ratio between
* Dunit and Phy
*/
reg = reg_read(REG_DDR_IO_ADDR) &
~(1 << REG_DDR_IO_CLK_RATIO_OFFS);
}
dfs_reg_write(REG_DDR_IO_ADDR, reg); /* 0x1524 - DDR IO Register */
/* Configure - 2T Mode - Restore original configuration */
reg = reg_read(REG_DUNIT_CTRL_LOW_ADDR);
/* [3:4] 2T - Restore value */
reg &= ~(REG_DUNIT_CTRL_LOW_2T_MASK << REG_DUNIT_CTRL_LOW_2T_OFFS);
reg |= ((dram_info->mode_2t & REG_DUNIT_CTRL_LOW_2T_MASK) <<
REG_DUNIT_CTRL_LOW_2T_OFFS);
/* 0x1404 - DDR Controller Control Low Register */
dfs_reg_write(REG_DUNIT_CTRL_LOW_ADDR, reg);
/* Configure - Restore CL and CWL - MRS Commands */
reg = reg_read(REG_DFS_ADDR);
reg &= ~(REG_DFS_CL_NEXT_STATE_MASK << REG_DFS_CL_NEXT_STATE_OFFS);
reg &= ~(REG_DFS_CWL_NEXT_STATE_MASK << REG_DFS_CWL_NEXT_STATE_OFFS);
if (freq == DDR_400) {
if (dram_info->target_frequency == 0x8)
tmp = ddr3_cl_to_valid_cl(5);
else
tmp = ddr3_cl_to_valid_cl(6);
} else {
tmp = ddr3_cl_to_valid_cl(dram_info->cl);
}
/* [8] - DfsCLNextState */
reg |= ((tmp & REG_DFS_CL_NEXT_STATE_MASK) << REG_DFS_CL_NEXT_STATE_OFFS);
if (freq == DDR_400) {
/* [12] - DfsCWLNextState */
reg |= (((0) & REG_DFS_CWL_NEXT_STATE_MASK) <<
REG_DFS_CWL_NEXT_STATE_OFFS);
} else {
/* [12] - DfsCWLNextState */
reg |= (((dram_info->cwl) & REG_DFS_CWL_NEXT_STATE_MASK) <<
REG_DFS_CWL_NEXT_STATE_OFFS);
}
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* Optional - Configure - DDR3_Rtt_nom_CS# */
for (cs = 0; cs < MAX_CS; cs++) {
if (dram_info->cs_ena & (1 << cs)) {
reg = reg_read(REG_DDR3_MR1_CS_ADDR +
(cs << MR_CS_ADDR_OFFS));
reg &= REG_DDR3_MR1_RTT_MASK;
reg |= odt_static[dram_info->cs_ena][cs];
dfs_reg_write(REG_DDR3_MR1_CS_ADDR +
(cs << MR_CS_ADDR_OFFS), reg);
}
}
/* Configure - Reset ADLLs - Set Reset */
reg = reg_read(REG_DRAM_PHY_CONFIG_ADDR) & REG_DRAM_PHY_CONFIG_MASK;
/* [31:30]] - reset pup data ctrl ADLL */
/* 0x15EC - DRAM PHY Config Register */
dfs_reg_write(REG_DRAM_PHY_CONFIG_ADDR, reg);
/* Configure - Reset ADLLs - Release Reset */
reg = reg_read(REG_DRAM_PHY_CONFIG_ADDR) | ~REG_DRAM_PHY_CONFIG_MASK;
/* [31:30] - normal pup data ctrl ADLL */
/* 0x15EC - DRAM PHY Config register */
dfs_reg_write(REG_DRAM_PHY_CONFIG_ADDR, reg);
/* Poll - Wait for APLL + ADLLs lock on new frequency */
do {
reg = reg_read(REG_PHY_LOCK_STATUS_ADDR) &
REG_PHY_LOCK_APLL_ADLL_STATUS_MASK;
/* 0x1674 [10:0] - Phy lock status Register */
} while (reg != REG_PHY_LOCK_APLL_ADLL_STATUS_MASK);
/* Configure - Reset the PHY SDR clock divider */
if (ratio_2to1) {
/* Pup Reset Divider B - Set Reset */
/* [28] - DataPupRdRST = 0 */
reg = reg_read(REG_SDRAM_CONFIG_ADDR) &
~(1 << REG_SDRAM_CONFIG_PUPRSTDIV_OFFS);
/* [28] - DataPupRdRST = 1 */
tmp = reg_read(REG_SDRAM_CONFIG_ADDR) |
(1 << REG_SDRAM_CONFIG_PUPRSTDIV_OFFS);
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
/* Pup Reset Divider B - Release Reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, tmp);
}
/* Configure - Reset the PHY Read FIFO and Write channels - Set Reset */
reg = reg_read(REG_SDRAM_CONFIG_ADDR) & REG_SDRAM_CONFIG_MASK;
/* [30:29] = 0 - Data Pup R/W path reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
/*
* Configure - DRAM Data PHY Read [30], Write [29] path reset -
* Release Reset
*/
reg = reg_read(REG_SDRAM_CONFIG_ADDR) | ~REG_SDRAM_CONFIG_MASK;
/* [30:29] = '11' - Data Pup R/W path reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
/* Registered DIMM support */
if (dram_info->reg_dimm) {
/*
* Configure - Change register DRAM operating speed
* (DDR3-1333 / DDR3-1600) - CWA_RC
*/
reg = (0xA & REG_SDRAM_OPERATION_CWA_RC_MASK) <<
REG_SDRAM_OPERATION_CWA_RC_OFFS;
if (freq <= DDR_400) {
/*
* Configure - Change register DRAM operating speed
* (DDR3-800) - CWA_DATA
*/
reg |= ((0x0 & REG_SDRAM_OPERATION_CWA_DATA_MASK) <<
REG_SDRAM_OPERATION_CWA_DATA_OFFS);
} else if ((freq > DDR_400) && (freq <= DDR_533)) {
/*
* Configure - Change register DRAM operating speed
* (DDR3-1066) - CWA_DATA
*/
reg |= ((0x1 & REG_SDRAM_OPERATION_CWA_DATA_MASK) <<
REG_SDRAM_OPERATION_CWA_DATA_OFFS);
} else if ((freq > DDR_533) && (freq <= DDR_666)) {
/*
* Configure - Change register DRAM operating speed
* (DDR3-1333) - CWA_DATA
*/
reg |= ((0x2 & REG_SDRAM_OPERATION_CWA_DATA_MASK) <<
REG_SDRAM_OPERATION_CWA_DATA_OFFS);
} else {
/*
* Configure - Change register DRAM operating speed
* (DDR3-1600) - CWA_DATA
*/
reg |= ((0x3 & REG_SDRAM_OPERATION_CWA_DATA_MASK) <<
REG_SDRAM_OPERATION_CWA_DATA_OFFS);
}
/* Configure - Set Delay - tSTAB */
reg |= (0x1 << REG_SDRAM_OPERATION_CWA_DELAY_SEL_OFFS);
/* Configure - Issue CWA command with the above parameters */
reg |= (REG_SDRAM_OPERATION_CMD_CWA &
~(0xF << REG_SDRAM_OPERATION_CS_OFFS));
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for CWA operation completion */
do {
reg = reg_read(REG_SDRAM_OPERATION_ADDR) &
REG_SDRAM_OPERATION_CMD_MASK;
} while (reg);
}
/* Configure - Exit Self Refresh */
/* [2] - DfsSR */
reg = reg_read(REG_DFS_ADDR) & ~(1 << REG_DFS_SR_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Poll - DFS Register - 0x1528 [3] - DfsAtSR - All DRAM
* devices on all ranks are NOT in self refresh mode
*/
do {
reg = reg_read(REG_DFS_ADDR) & (1 << REG_DFS_ATSR_OFFS);
} while (reg); /* Wait for '0' */
/* Configure - Issue Refresh command */
/* [3-0] = 0x2 - Refresh Command, [11-8] - enabled Cs */
reg = REG_SDRAM_OPERATION_CMD_RFRS;
for (cs = 0; cs < MAX_CS; cs++) {
if (dram_info->cs_ena & (1 << cs))
reg &= ~(1 << (REG_SDRAM_OPERATION_CS_OFFS + cs));
}
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for Refresh operation completion */
wait_refresh_op_complete();
/* Configure - Block new external transactions - Disable */
reg = reg_read(REG_DFS_ADDR);
reg &= ~(1 << REG_DFS_BLOCK_OFFS); /* [1] - DfsBlock - Disable */
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Configure - XBAR Retry response during Block to enable
* internal access - Disable
*/
reg = reg_read(REG_METAL_MASK_ADDR);
/* [0] - RetryMask - Enable */
reg |= (1 << REG_METAL_MASK_RETRY_OFFS);
/* 0x14B0 - Dunit MMask Register */
dfs_reg_write(REG_METAL_MASK_ADDR, reg);
for (cs = 0; cs < MAX_CS; cs++) {
if (dram_info->cs_ena & (1 << cs)) {
/* Configure - Set CL */
reg = reg_read(REG_DDR3_MR0_CS_ADDR +
(cs << MR_CS_ADDR_OFFS)) &
~REG_DDR3_MR0_CL_MASK;
if (freq == DDR_400)
tmp = ddr3_cl_to_valid_cl(6);
else
tmp = ddr3_cl_to_valid_cl(dram_info->cl);
reg |= ((tmp & 0x1) << REG_DDR3_MR0_CL_OFFS);
reg |= ((tmp & 0xE) << REG_DDR3_MR0_CL_HIGH_OFFS);
dfs_reg_write(REG_DDR3_MR0_CS_ADDR +
(cs << MR_CS_ADDR_OFFS), reg);
/* Configure - Set CWL */
reg = reg_read(REG_DDR3_MR2_CS_ADDR +
(cs << MR_CS_ADDR_OFFS)) &
~(REG_DDR3_MR2_CWL_MASK << REG_DDR3_MR2_CWL_OFFS);
if (freq == DDR_400)
reg |= ((0) << REG_DDR3_MR2_CWL_OFFS);
else
reg |= ((dram_info->cwl) << REG_DDR3_MR2_CWL_OFFS);
dfs_reg_write(REG_DDR3_MR2_CS_ADDR +
(cs << MR_CS_ADDR_OFFS), reg);
}
}
DEBUG_DFS_C("DDR3 - DFS - Low To High - Ended successfuly - new Frequency - ",
freq, 1);
return MV_OK;
#else
/* This Flow is relevant for Armada370 A0 and ArmadaXP Z1 */
u32 reg, freq_par, tmp;
u32 cs = 0;
DEBUG_DFS_C("DDR3 - DFS - Low To High - Starting DFS procedure to Frequency - ",
freq, 1);
/* target frequency - freq */
freq_par = ddr3_get_freq_parameter(freq, ratio_2to1);
reg = 0x0000FF00;
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_1_ADDR, reg);
/* 0x1600 - PHY lock mask register */
reg = reg_read(REG_ODPG_CNTRL_ADDR);
reg |= (1 << REG_ODPG_CNTRL_OFFS); /* [21] = 1 */
dfs_reg_write(REG_ODPG_CNTRL_ADDR, reg);
/* 0x1670 - PHY lock mask register */
reg = reg_read(REG_PHY_LOCK_MASK_ADDR);
reg &= REG_PHY_LOCK_MASK_MASK; /* [11:0] = 0 */
dfs_reg_write(REG_PHY_LOCK_MASK_ADDR, reg);
/* Enable reconfig MR Registers after DFS */
reg = reg_read(REG_DFS_ADDR); /* 0x1528 - DFS register */
/* [4] - Disable - reconfig MR registers after DFS_ERG */
reg &= ~0x11;
/* [0] - Enable - DRAM DLL after DFS */
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* Disable DRAM Controller to crossbar retry */
/* [0] - disable */
reg = reg_read(REG_METAL_MASK_ADDR) & ~(1 << 0);
/* 0x14B0 - Dunit MMask Register */
dfs_reg_write(REG_METAL_MASK_ADDR, reg);
/* Enable DRAM Blocking */
/* [1] - DFS Block enable */
reg = reg_read(REG_DFS_ADDR) | (1 << REG_DFS_BLOCK_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* Enable Self refresh */
/* [2] - DFS Self refresh enable */
reg = reg_read(REG_DFS_ADDR) | (1 << REG_DFS_SR_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Poll DFS Register - All DRAM devices on all ranks are in
* self refresh mode - DFS can be executed afterwards
*/
/* 0x1528 [3] - DfsAtSR */
do {
reg = reg_read(REG_DFS_ADDR) & (1 << REG_DFS_ATSR_OFFS);
} while (reg == 0x0); /* Wait for '1' */
/*
* Set Correct Ratio - if freq>MARGIN_FREQ use 2:1 ratio
* else use 1:1 ratio
*/
if (ratio_2to1) {
/* [15] = 1 - Set 2:1 Ratio between Dunit and Phy */
reg = reg_read(REG_DDR_IO_ADDR) |
(1 << REG_DDR_IO_CLK_RATIO_OFFS);
} else {
/* [15] = 0 - Set 1:1 Ratio between Dunit and Phy */
reg = reg_read(REG_DDR_IO_ADDR) &
~(1 << REG_DDR_IO_CLK_RATIO_OFFS);
}
dfs_reg_write(REG_DDR_IO_ADDR, reg); /* 0x1524 - DDR IO Register */
/* Switch HCLK Mux from (100Mhz) [16]=0, keep DFS request bit */
reg = 0x20040000;
/*
* [29] - training logic request DFS, [28:27] -
* preload patterns frequency [18]
*/
/* 0x18488 - DRAM Init control status register */
dfs_reg_write(REG_DRAM_INIT_CTRL_STATUS_ADDR, reg);
/* Add delay between entering SR and start ratio modification */
udelay(1);
/*
* Initial Setup - assure that the "load new ratio" is clear (bit 24)
* and in the same chance, block reassertions of reset [15:8] and
* force reserved bits[7:0].
*/
reg = 0x0000FFFF;
/* 0x18700 - CPU Div CLK control 0 */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
/*
* RelaX whenever reset is asserted to that channel (good for any case)
*/
reg = 0x0000FF00;
/* 0x18704 - CPU Div CLK control 0 */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_1_ADDR, reg);
reg = reg_read(REG_CPU_DIV_CLK_CTRL_3_ADDR) &
REG_CPU_DIV_CLK_CTRL_3_FREQ_MASK;
reg |= (freq_par << REG_CPU_DIV_CLK_CTRL_3_FREQ_OFFS);
/* Full Integer ratio from PLL-out to ddr-clk */
/* 0x1870C - CPU Div CLK control 3 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_3_ADDR, reg);
/*
* Shut off clock enable to the DDRPHY clock channel (this is the "D").
* All the rest are kept as is (forced, but could be read-modify-write).
* This is done now by RMW above.
*/
reg = 0x000FFF02;
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_4_ADDR, reg);
/* Wait before replacing the clock on the DDR Phy Channel. */
udelay(1);
reg = 0x0102FDFF;
/*
* This for triggering the frequency update. Bit[24] is the
* central control
* bits [23:16] == which channels to change ==2 ==> only DDR Phy
* (smooth transition)
* bits [15:8] == mask reset reassertion due to clock modification
* to these channels.
* bits [7:0] == not in use
*/
/* 0x18700 - CPU Div CLK control 0 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
udelay(1);
/*
* Poll Div CLK status 0 register - indication that the clocks are
* active - 0x18718 [8]
*/
do {
reg = reg_read(REG_CPU_DIV_CLK_STATUS_0_ADDR) &
(1 << REG_CPU_DIV_CLK_ALL_STABLE_OFFS);
} while (reg == 0);
reg = 0x000000FF;
/*
* Clean the CTRL0, to be ready for next resets and next requests of
* ratio modifications.
*/
/* 0x18700 - CPU Div CLK control 0 register */
dfs_reg_write(REG_CPU_DIV_CLK_CTRL_0_ADDR, reg);
udelay(5);
if (ratio_2to1) {
/* Pup Reset Divider B - Set Reset */
/* [28] = 0 - Pup Reset Divider B */
reg = reg_read(REG_SDRAM_CONFIG_ADDR) & ~(1 << 28);
/* [28] = 1 - Pup Reset Divider B */
tmp = reg_read(REG_SDRAM_CONFIG_ADDR) | (1 << 28);
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
/* Pup Reset Divider B - Release Reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, tmp);
}
/* DRAM Data PHYs ADLL Reset - Set Reset */
reg = (reg_read(REG_DRAM_PHY_CONFIG_ADDR) & REG_DRAM_PHY_CONFIG_MASK);
/* [31:30]] - reset pup data ctrl ADLL */
/* 0x15EC - DRAM PHY Config Register */
dfs_reg_write(REG_DRAM_PHY_CONFIG_ADDR, reg);
udelay(25);
/* APLL lock indication - Poll Phy lock status Register - 0x1674 [9] */
do {
reg = reg_read(REG_PHY_LOCK_STATUS_ADDR) &
(1 << REG_PHY_LOCK_STATUS_LOCK_OFFS);
} while (reg == 0);
/* DRAM Data PHYs ADLL Reset - Release Reset */
reg = reg_read(REG_DRAM_PHY_CONFIG_ADDR) | ~REG_DRAM_PHY_CONFIG_MASK;
/* [31:30] - normal pup data ctrl ADLL */
/* 0x15EC - DRAM PHY Config register */
dfs_reg_write(REG_DRAM_PHY_CONFIG_ADDR, reg);
udelay(10000); /* Wait 10msec */
/*
* APLL lock indication - Poll Phy lock status Register - 0x1674 [11:0]
*/
do {
reg = reg_read(REG_PHY_LOCK_STATUS_ADDR) &
REG_PHY_LOCK_STATUS_LOCK_MASK;
} while (reg != REG_PHY_LOCK_STATUS_LOCK_MASK);
/* DRAM Data PHY Read [30], Write [29] path reset - Set Reset */
reg = reg_read(REG_SDRAM_CONFIG_ADDR) & REG_SDRAM_CONFIG_MASK;
/* [30:29] = 0 - Data Pup R/W path reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
/* DRAM Data PHY Read [30], Write [29] path reset - Release Reset */
reg = reg_read(REG_SDRAM_CONFIG_ADDR) | ~REG_SDRAM_CONFIG_MASK;
/* [30:29] = '11' - Data Pup R/W path reset */
/* 0x1400 - SDRAM Configuration register */
dfs_reg_write(REG_SDRAM_CONFIG_ADDR, reg);
/* Disable DFS Reconfig */
reg = reg_read(REG_DFS_ADDR) & ~(1 << 4);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* [2] - DFS Self refresh disable */
reg = reg_read(REG_DFS_ADDR) & ~(1 << REG_DFS_SR_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/*
* Poll DFS Register - 0x1528 [3] - DfsAtSR - All DRAM devices on
* all ranks are NOT in self refresh mode
*/
do {
reg = reg_read(REG_DFS_ADDR) & (1 << REG_DFS_ATSR_OFFS);
} while (reg); /* Wait for '0' */
/* 0x1404 */
reg = (reg_read(REG_DUNIT_CTRL_LOW_ADDR) & 0xFFFFFFE7) | 0x2;
/* Configure - 2T Mode - Restore original configuration */
/* [3:4] 2T - Restore value */
reg &= ~(REG_DUNIT_CTRL_LOW_2T_MASK << REG_DUNIT_CTRL_LOW_2T_OFFS);
reg |= ((dram_info->mode_2t & REG_DUNIT_CTRL_LOW_2T_MASK) <<
REG_DUNIT_CTRL_LOW_2T_OFFS);
dfs_reg_write(REG_DUNIT_CTRL_LOW_ADDR, reg);
udelay(1); /* Wait 1us */
for (cs = 0; cs < MAX_CS; cs++) {
if (dram_info->cs_ena & (1 << cs)) {
reg = (reg_read(REG_DDR3_MR1_ADDR));
/* DLL Enable */
reg &= ~(1 << REG_DDR3_MR1_DLL_ENA_OFFS);
dfs_reg_write(REG_DDR3_MR1_ADDR, reg);
/* Issue MRS Command to current cs */
reg = REG_SDRAM_OPERATION_CMD_MR1 &
~(1 << (REG_SDRAM_OPERATION_CS_OFFS + cs));
/*
* [3-0] = 0x4 - MR1 Command, [11-8] -
* enable current cs
*/
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for Refresh operation completion */
wait_refresh_op_complete();
/* DLL Reset - MR0 */
reg = reg_read(REG_DDR3_MR0_ADDR);
dfs_reg_write(REG_DDR3_MR0_ADDR, reg);
/* Issue MRS Command to current cs */
reg = REG_SDRAM_OPERATION_CMD_MR0 &
~(1 << (REG_SDRAM_OPERATION_CS_OFFS + cs));
/*
* [3-0] = 0x4 - MR1 Command, [11-8] -
* enable current cs
*/
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for Refresh operation completion */
wait_refresh_op_complete();
reg = reg_read(REG_DDR3_MR0_ADDR);
reg &= ~0x74; /* CL [3:0]; [6:4],[2] */
if (freq == DDR_400)
tmp = ddr3_cl_to_valid_cl(6) & 0xF;
else
tmp = ddr3_cl_to_valid_cl(dram_info->cl) & 0xF;
reg |= ((tmp & 0x1) << 2);
reg |= ((tmp >> 1) << 4); /* to bit 4 */
dfs_reg_write(REG_DDR3_MR0_ADDR, reg);
reg = REG_SDRAM_OPERATION_CMD_MR0 &
~(1 << (REG_SDRAM_OPERATION_CS_OFFS + cs));
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for Refresh operation completion */
wait_refresh_op_complete();
reg = reg_read(REG_DDR3_MR2_ADDR);
reg &= ~0x38; /* CWL [5:3] */
/* CWL = 0 ,for 400 MHg is 5 */
if (freq != DDR_400)
reg |= dram_info->cwl << REG_DDR3_MR2_CWL_OFFS;
dfs_reg_write(REG_DDR3_MR2_ADDR, reg);
reg = REG_SDRAM_OPERATION_CMD_MR2 &
~(1 << (REG_SDRAM_OPERATION_CS_OFFS + cs));
/* 0x1418 - SDRAM Operation Register */
dfs_reg_write(REG_SDRAM_OPERATION_ADDR, reg);
/* Poll - Wait for Refresh operation completion */
wait_refresh_op_complete();
/* Set current rd_sample_delay */
reg = reg_read(REG_READ_DATA_SAMPLE_DELAYS_ADDR);
reg &= ~(REG_READ_DATA_SAMPLE_DELAYS_MASK <<
(REG_READ_DATA_SAMPLE_DELAYS_OFFS * cs));
reg |= (dram_info->cl <<
(REG_READ_DATA_SAMPLE_DELAYS_OFFS * cs));
dfs_reg_write(REG_READ_DATA_SAMPLE_DELAYS_ADDR, reg);
/* Set current rd_ready_delay */
reg = reg_read(REG_READ_DATA_READY_DELAYS_ADDR);
reg &= ~(REG_READ_DATA_READY_DELAYS_MASK <<
(REG_READ_DATA_READY_DELAYS_OFFS * cs));
reg |= ((dram_info->cl + 1) <<
(REG_READ_DATA_SAMPLE_DELAYS_OFFS * cs));
dfs_reg_write(REG_READ_DATA_READY_DELAYS_ADDR, reg);
}
}
/* Enable ODT on DLL-on mode */
dfs_reg_write(REG_SDRAM_ODT_CTRL_HIGH_ADDR, 0);
/* [1] - DFS Block disable */
reg = reg_read(REG_DFS_ADDR) & ~(1 << REG_DFS_BLOCK_OFFS);
dfs_reg_write(REG_DFS_ADDR, reg); /* 0x1528 - DFS register */
/* Change DDR frequency to 100MHz procedure: */
/* 0x1600 - PHY lock mask register */
reg = reg_read(REG_ODPG_CNTRL_ADDR);
reg &= ~(1 << REG_ODPG_CNTRL_OFFS); /* [21] = 0 */
dfs_reg_write(REG_ODPG_CNTRL_ADDR, reg);
/* Change DDR frequency to 100MHz procedure: */
/* 0x1670 - PHY lock mask register */
reg = reg_read(REG_PHY_LOCK_MASK_ADDR);
reg |= ~REG_PHY_LOCK_MASK_MASK; /* [11:0] = FFF */
dfs_reg_write(REG_PHY_LOCK_MASK_ADDR, reg);
reg = reg_read(REG_METAL_MASK_ADDR) | (1 << 0); /* [0] - disable */
/* 0x14B0 - Dunit MMask Register */
dfs_reg_write(REG_METAL_MASK_ADDR, reg);
DEBUG_DFS_C("DDR3 - DFS - Low To High - Ended successfuly - new Frequency - ",
freq, 1);
return MV_OK;
#endif
}