470 lines
15 KiB
C
470 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015-2016 Wills Wang <wills.wang@live.com>
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* Based on Atheros LSDK/QSDK
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/addrspace.h>
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#include <asm/types.h>
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#include <mach/ar71xx_regs.h>
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#include <mach/ath79.h>
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#define DDR_CTRL_UPD_EMR3S BIT(5)
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#define DDR_CTRL_UPD_EMR2S BIT(4)
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#define DDR_CTRL_PRECHARGE BIT(3)
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#define DDR_CTRL_AUTO_REFRESH BIT(2)
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#define DDR_CTRL_UPD_EMRS BIT(1)
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#define DDR_CTRL_UPD_MRS BIT(0)
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#define DDR_REFRESH_EN BIT(14)
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#define DDR_REFRESH_M 0x3ff
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#define DDR_REFRESH(x) ((x) & DDR_REFRESH_M)
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#define DDR_REFRESH_VAL (DDR_REFRESH_EN | DDR_REFRESH(312))
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#define DDR_TRAS_S 0
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#define DDR_TRAS_M 0x1f
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#define DDR_TRAS(x) (((x) & DDR_TRAS_M) << DDR_TRAS_S)
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#define DDR_TRCD_M 0xf
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#define DDR_TRCD_S 5
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#define DDR_TRCD(x) (((x) & DDR_TRCD_M) << DDR_TRCD_S)
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#define DDR_TRP_M 0xf
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#define DDR_TRP_S 9
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#define DDR_TRP(x) (((x) & DDR_TRP_M) << DDR_TRP_S)
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#define DDR_TRRD_M 0xf
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#define DDR_TRRD_S 13
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#define DDR_TRRD(x) (((x) & DDR_TRRD_M) << DDR_TRRD_S)
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#define DDR_TRFC_M 0x7f
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#define DDR_TRFC_S 17
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#define DDR_TRFC(x) (((x) & DDR_TRFC_M) << DDR_TRFC_S)
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#define DDR_TMRD_M 0xf
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#define DDR_TMRD_S 23
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#define DDR_TMRD(x) (((x) & DDR_TMRD_M) << DDR_TMRD_S)
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#define DDR_CAS_L_M 0x17
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#define DDR_CAS_L_S 27
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#define DDR_CAS_L(x) (((x) & DDR_CAS_L_M) << DDR_CAS_L_S)
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#define DDR_OPEN BIT(30)
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#define DDR1_CONF_REG_VAL (DDR_TRAS(16) | DDR_TRCD(6) | \
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DDR_TRP(6) | DDR_TRRD(4) | \
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DDR_TRFC(7) | DDR_TMRD(5) | \
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DDR_CAS_L(7) | DDR_OPEN)
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#define DDR2_CONF_REG_VAL (DDR_TRAS(27) | DDR_TRCD(9) | \
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DDR_TRP(9) | DDR_TRRD(7) | \
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DDR_TRFC(21) | DDR_TMRD(15) | \
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DDR_CAS_L(17) | DDR_OPEN)
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#define DDR_BURST_LEN_S 0
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#define DDR_BURST_LEN_M 0xf
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#define DDR_BURST_LEN(x) ((x) << DDR_BURST_LEN_S)
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#define DDR_BURST_TYPE BIT(4)
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#define DDR_CNTL_OE_EN BIT(5)
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#define DDR_PHASE_SEL BIT(6)
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#define DDR_CKE BIT(7)
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#define DDR_TWR_S 8
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#define DDR_TWR_M 0xf
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#define DDR_TWR(x) (((x) & DDR_TWR_M) << DDR_TWR_S)
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#define DDR_TRTW_S 12
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#define DDR_TRTW_M 0x1f
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#define DDR_TRTW(x) (((x) & DDR_TRTW_M) << DDR_TRTW_S)
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#define DDR_TRTP_S 17
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#define DDR_TRTP_M 0xf
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#define DDR_TRTP(x) (((x) & DDR_TRTP_M) << DDR_TRTP_S)
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#define DDR_TWTR_S 21
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#define DDR_TWTR_M 0x1f
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#define DDR_TWTR(x) (((x) & DDR_TWTR_M) << DDR_TWTR_S)
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#define DDR_G_OPEN_L_S 26
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#define DDR_G_OPEN_L_M 0xf
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#define DDR_G_OPEN_L(x) ((x) << DDR_G_OPEN_L_S)
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#define DDR_HALF_WIDTH_LOW BIT(31)
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#define DDR1_CONF2_REG_VAL (DDR_BURST_LEN(8) | DDR_CNTL_OE_EN | \
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DDR_CKE | DDR_TWR(13) | DDR_TRTW(14) | \
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DDR_TRTP(8) | DDR_TWTR(14) | \
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DDR_G_OPEN_L(6) | DDR_HALF_WIDTH_LOW)
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#define DDR2_CONF2_REG_VAL (DDR_BURST_LEN(8) | DDR_CNTL_OE_EN | \
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DDR_CKE | DDR_TWR(1) | DDR_TRTW(14) | \
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DDR_TRTP(9) | DDR_TWTR(21) | \
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DDR_G_OPEN_L(8) | DDR_HALF_WIDTH_LOW)
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#define DDR_TWR_MSB BIT(3)
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#define DDR_TRAS_MSB BIT(2)
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#define DDR_TRFC_MSB_M 0x3
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#define DDR_TRFC_MSB(x) (x)
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#define DDR1_CONF3_REG_VAL 0
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#define DDR2_CONF3_REG_VAL (DDR_TWR_MSB | DDR_TRFC_MSB(2))
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#define DDR_CTL_SRAM_TSEL BIT(30)
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#define DDR_CTL_SRAM_GE0_SYNC BIT(20)
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#define DDR_CTL_SRAM_GE1_SYNC BIT(19)
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#define DDR_CTL_SRAM_USB_SYNC BIT(18)
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#define DDR_CTL_SRAM_PCIE_SYNC BIT(17)
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#define DDR_CTL_SRAM_WMAC_SYNC BIT(16)
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#define DDR_CTL_SRAM_MISC1_SYNC BIT(15)
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#define DDR_CTL_SRAM_MISC2_SYNC BIT(14)
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#define DDR_CTL_PAD_DDR2_SEL BIT(6)
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#define DDR_CTL_HALF_WIDTH BIT(1)
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#define DDR_CTL_CONFIG_VAL (DDR_CTL_SRAM_TSEL | \
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DDR_CTL_SRAM_GE0_SYNC | \
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DDR_CTL_SRAM_GE1_SYNC | \
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DDR_CTL_SRAM_USB_SYNC | \
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DDR_CTL_SRAM_PCIE_SYNC | \
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DDR_CTL_SRAM_WMAC_SYNC | \
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DDR_CTL_HALF_WIDTH)
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#define DDR_BURST_GE0_MAX_BL_S 0
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#define DDR_BURST_GE0_MAX_BL_M 0xf
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#define DDR_BURST_GE0_MAX_BL(x) \
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(((x) & DDR_BURST_GE0_MAX_BL_M) << DDR_BURST_GE0_MAX_BL_S)
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#define DDR_BURST_GE1_MAX_BL_S 4
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#define DDR_BURST_GE1_MAX_BL_M 0xf
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#define DDR_BURST_GE1_MAX_BL(x) \
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(((x) & DDR_BURST_GE1_MAX_BL_M) << DDR_BURST_GE1_MAX_BL_S)
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#define DDR_BURST_PCIE_MAX_BL_S 8
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#define DDR_BURST_PCIE_MAX_BL_M 0xf
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#define DDR_BURST_PCIE_MAX_BL(x) \
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(((x) & DDR_BURST_PCIE_MAX_BL_M) << DDR_BURST_PCIE_MAX_BL_S)
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#define DDR_BURST_USB_MAX_BL_S 12
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#define DDR_BURST_USB_MAX_BL_M 0xf
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#define DDR_BURST_USB_MAX_BL(x) \
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(((x) & DDR_BURST_USB_MAX_BL_M) << DDR_BURST_USB_MAX_BL_S)
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#define DDR_BURST_CPU_MAX_BL_S 16
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#define DDR_BURST_CPU_MAX_BL_M 0xf
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#define DDR_BURST_CPU_MAX_BL(x) \
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(((x) & DDR_BURST_CPU_MAX_BL_M) << DDR_BURST_CPU_MAX_BL_S)
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#define DDR_BURST_RD_MAX_BL_S 20
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#define DDR_BURST_RD_MAX_BL_M 0xf
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#define DDR_BURST_RD_MAX_BL(x) \
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(((x) & DDR_BURST_RD_MAX_BL_M) << DDR_BURST_RD_MAX_BL_S)
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#define DDR_BURST_WR_MAX_BL_S 24
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#define DDR_BURST_WR_MAX_BL_M 0xf
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#define DDR_BURST_WR_MAX_BL(x) \
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(((x) & DDR_BURST_WR_MAX_BL_M) << DDR_BURST_WR_MAX_BL_S)
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#define DDR_BURST_RWP_MASK_EN_S 28
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#define DDR_BURST_RWP_MASK_EN_M 0x3
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#define DDR_BURST_RWP_MASK_EN(x) \
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(((x) & DDR_BURST_RWP_MASK_EN_M) << DDR_BURST_RWP_MASK_EN_S)
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#define DDR_BURST_CPU_PRI_BE BIT(30)
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#define DDR_BURST_CPU_PRI BIT(31)
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#define DDR_BURST_VAL (DDR_BURST_CPU_PRI_BE | \
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DDR_BURST_RWP_MASK_EN(3) | \
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DDR_BURST_WR_MAX_BL(4) | \
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DDR_BURST_RD_MAX_BL(4) | \
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DDR_BURST_CPU_MAX_BL(4) | \
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DDR_BURST_USB_MAX_BL(4) | \
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DDR_BURST_PCIE_MAX_BL(4) | \
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DDR_BURST_GE1_MAX_BL(4) | \
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DDR_BURST_GE0_MAX_BL(4))
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#define DDR_BURST_WMAC_MAX_BL_S 0
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#define DDR_BURST_WMAC_MAX_BL_M 0xf
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#define DDR_BURST_WMAC_MAX_BL(x) \
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(((x) & DDR_BURST_WMAC_MAX_BL_M) << DDR_BURST_WMAC_MAX_BL_S)
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#define DDR_BURST2_VAL DDR_BURST_WMAC_MAX_BL(4)
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#define DDR2_CONF_TWL_S 10
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#define DDR2_CONF_TWL_M 0xf
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#define DDR2_CONF_TWL(x) \
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(((x) & DDR2_CONF_TWL_M) << DDR2_CONF_TWL_S)
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#define DDR2_CONF_ODT BIT(9)
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#define DDR2_CONF_TFAW_S 2
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#define DDR2_CONF_TFAW_M 0x3f
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#define DDR2_CONF_TFAW(x) \
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(((x) & DDR2_CONF_TFAW_M) << DDR2_CONF_TFAW_S)
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#define DDR2_CONF_EN BIT(0)
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#define DDR2_CONF_VAL (DDR2_CONF_TWL(5) | \
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DDR2_CONF_TFAW(31) | \
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DDR2_CONF_ODT | \
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DDR2_CONF_EN)
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#define DDR1_EXT_MODE_VAL 0
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#define DDR2_EXT_MODE_VAL 0x402
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#define DDR2_EXT_MODE_OCD_VAL 0x782
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#define DDR1_MODE_DLL_VAL 0x133
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#define DDR2_MODE_DLL_VAL 0x143
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#define DDR1_MODE_VAL 0x33
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#define DDR2_MODE_VAL 0x43
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#define DDR1_TAP_VAL 0x20
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#define DDR2_TAP_VAL 0x10
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#define DDR_REG_BIST_MASK_ADDR_0 0x2c
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#define DDR_REG_BIST_MASK_ADDR_1 0x30
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#define DDR_REG_BIST_MASK_AHB_GE0_0 0x34
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#define DDR_REG_BIST_COMP_AHB_GE0_0 0x38
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#define DDR_REG_BIST_MASK_AHB_GE1_0 0x3c
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#define DDR_REG_BIST_COMP_AHB_GE1_0 0x40
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#define DDR_REG_BIST_COMP_ADDR_0 0x64
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#define DDR_REG_BIST_COMP_ADDR_1 0x68
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#define DDR_REG_BIST_MASK_AHB_GE0_1 0x6c
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#define DDR_REG_BIST_COMP_AHB_GE0_1 0x70
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#define DDR_REG_BIST_MASK_AHB_GE1_1 0x74
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#define DDR_REG_BIST_COMP_AHB_GE1_1 0x78
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#define DDR_REG_BIST 0x11c
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#define DDR_REG_BIST_STATUS 0x120
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#define DDR_BIST_COMP_CNT_S 1
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#define DDR_BIST_COMP_CNT_M 0xff
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#define DDR_BIST_COMP_CNT(x) \
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(((x) & DDR_BIST_COMP_CNT_M) << DDR_BIST_COMP_CNT_S)
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#define DDR_BIST_COMP_CNT_MASK \
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(DDR_BIST_COMP_CNT_M << DDR_BIST_COMP_CNT_S)
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#define DDR_BIST_TEST_START BIT(0)
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#define DDR_BIST_STATUS_DONE BIT(0)
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/* 4 Row Address Bits, 4 Column Address Bits, 2 BA bits */
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#define DDR_BIST_MASK_ADDR_VAL 0xfa5de83f
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#define DDR_TAP_MAGIC_VAL 0xaa55aa55
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#define DDR_TAP_MAX_VAL 0x40
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void ddr_init(void)
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{
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void __iomem *regs;
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u32 val;
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regs = map_physmem(AR71XX_DDR_CTRL_BASE, AR71XX_DDR_CTRL_SIZE,
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MAP_NOCACHE);
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val = ath79_get_bootstrap();
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if (val & QCA953X_BOOTSTRAP_DDR1) {
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writel(DDR_CTL_CONFIG_VAL, regs + QCA953X_DDR_REG_CTL_CONF);
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udelay(10);
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/* For 16-bit DDR */
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writel(0xffff, regs + AR71XX_DDR_REG_RD_CYCLE);
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udelay(100);
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/* Burst size */
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writel(DDR_BURST_VAL, regs + QCA953X_DDR_REG_BURST);
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udelay(100);
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writel(DDR_BURST2_VAL, regs + QCA953X_DDR_REG_BURST2);
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udelay(100);
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/* AHB maximum timeout */
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writel(0xfffff, regs + QCA953X_DDR_REG_TIMEOUT_MAX);
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udelay(100);
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/* DRAM timing */
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writel(DDR1_CONF_REG_VAL, regs + AR71XX_DDR_REG_CONFIG);
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udelay(100);
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writel(DDR1_CONF2_REG_VAL, regs + AR71XX_DDR_REG_CONFIG2);
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udelay(100);
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writel(DDR1_CONF3_REG_VAL, regs + QCA953X_DDR_REG_CONFIG3);
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udelay(100);
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/* Precharge All */
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writel(DDR_CTRL_PRECHARGE, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* ODT disable, Full strength, Enable DLL */
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writel(DDR1_EXT_MODE_VAL, regs + AR71XX_DDR_REG_EMR);
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udelay(100);
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/* Update Extended Mode Register Set (EMRS) */
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writel(DDR_CTRL_UPD_EMRS, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Reset DLL, CAS Latency 3, Burst Length 8 */
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writel(DDR1_MODE_DLL_VAL, regs + AR71XX_DDR_REG_MODE);
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udelay(100);
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/* Update Mode Register Set (MRS) */
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writel(DDR_CTRL_UPD_MRS, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Precharge All */
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writel(DDR_CTRL_PRECHARGE, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Auto Refresh */
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writel(DDR_CTRL_AUTO_REFRESH, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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writel(DDR_CTRL_AUTO_REFRESH, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Normal DLL, CAS Latency 3, Burst Length 8 */
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writel(DDR1_MODE_VAL, regs + AR71XX_DDR_REG_MODE);
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udelay(100);
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/* Update Mode Register Set (MRS) */
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writel(DDR_CTRL_UPD_MRS, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Refresh time control */
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writel(DDR_REFRESH_VAL, regs + AR71XX_DDR_REG_REFRESH);
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udelay(100);
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/* DQS 0 Tap Control */
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writel(DDR1_TAP_VAL, regs + AR71XX_DDR_REG_TAP_CTRL0);
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/* DQS 1 Tap Control */
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writel(DDR1_TAP_VAL, regs + AR71XX_DDR_REG_TAP_CTRL1);
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} else {
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writel(DDR_CTRL_UPD_EMR2S, regs + AR71XX_DDR_REG_CONTROL);
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udelay(10);
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writel(DDR_CTRL_UPD_EMR3S, regs + AR71XX_DDR_REG_CONTROL);
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udelay(10);
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writel(DDR_CTL_CONFIG_VAL | DDR_CTL_PAD_DDR2_SEL,
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regs + QCA953X_DDR_REG_CTL_CONF);
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udelay(10);
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/* For 16-bit DDR */
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writel(0xffff, regs + AR71XX_DDR_REG_RD_CYCLE);
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udelay(100);
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/* Burst size */
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writel(DDR_BURST_VAL, regs + QCA953X_DDR_REG_BURST);
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udelay(100);
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writel(DDR_BURST2_VAL, regs + QCA953X_DDR_REG_BURST2);
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udelay(100);
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/* AHB maximum timeout */
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writel(0xfffff, regs + QCA953X_DDR_REG_TIMEOUT_MAX);
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udelay(100);
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/* DRAM timing */
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writel(DDR2_CONF_REG_VAL, regs + AR71XX_DDR_REG_CONFIG);
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udelay(100);
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writel(DDR2_CONF2_REG_VAL, regs + AR71XX_DDR_REG_CONFIG2);
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udelay(100);
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writel(DDR2_CONF3_REG_VAL, regs + QCA953X_DDR_REG_CONFIG3);
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udelay(100);
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/* Enable DDR2 */
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writel(DDR2_CONF_VAL, regs + QCA953X_DDR_REG_DDR2_CONFIG);
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udelay(100);
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/* Precharge All */
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writel(DDR_CTRL_PRECHARGE, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Update Extended Mode Register 2 Set (EMR2S) */
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writel(DDR_CTRL_UPD_EMR2S, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Update Extended Mode Register 3 Set (EMR3S) */
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writel(DDR_CTRL_UPD_EMR3S, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* 150 ohm, Reduced strength, Enable DLL */
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writel(DDR2_EXT_MODE_VAL, regs + AR71XX_DDR_REG_EMR);
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udelay(100);
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/* Update Extended Mode Register Set (EMRS) */
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writel(DDR_CTRL_UPD_EMRS, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Reset DLL, CAS Latency 4, Burst Length 8 */
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writel(DDR2_MODE_DLL_VAL, regs + AR71XX_DDR_REG_MODE);
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udelay(100);
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/* Update Mode Register Set (MRS) */
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writel(DDR_CTRL_UPD_MRS, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Precharge All */
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writel(DDR_CTRL_PRECHARGE, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Auto Refresh */
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writel(DDR_CTRL_AUTO_REFRESH, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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writel(DDR_CTRL_AUTO_REFRESH, regs + AR71XX_DDR_REG_CONTROL);
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udelay(100);
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/* Normal DLL, CAS Latency 4, Burst Length 8 */
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writel(DDR2_MODE_VAL, regs + AR71XX_DDR_REG_MODE);
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udelay(100);
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/* Mode Register Set (MRS) */
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writel(DDR_CTRL_UPD_MRS, regs + AR71XX_DDR_REG_CONTROL);
|
|
udelay(100);
|
|
|
|
/* Enable OCD, Enable DLL, Reduced Drive Strength */
|
|
writel(DDR2_EXT_MODE_OCD_VAL, regs + AR71XX_DDR_REG_EMR);
|
|
udelay(100);
|
|
|
|
/* Update Extended Mode Register Set (EMRS) */
|
|
writel(DDR_CTRL_UPD_EMRS, regs + AR71XX_DDR_REG_CONTROL);
|
|
udelay(100);
|
|
|
|
/* OCD diable, Enable DLL, Reduced Drive Strength */
|
|
writel(DDR2_EXT_MODE_VAL, regs + AR71XX_DDR_REG_EMR);
|
|
udelay(100);
|
|
|
|
/* Update Extended Mode Register Set (EMRS) */
|
|
writel(DDR_CTRL_UPD_EMRS, regs + AR71XX_DDR_REG_CONTROL);
|
|
udelay(100);
|
|
|
|
/* Refresh time control */
|
|
writel(DDR_REFRESH_VAL, regs + AR71XX_DDR_REG_REFRESH);
|
|
udelay(100);
|
|
|
|
/* DQS 0 Tap Control */
|
|
writel(DDR2_TAP_VAL, regs + AR71XX_DDR_REG_TAP_CTRL0);
|
|
|
|
/* DQS 1 Tap Control */
|
|
writel(DDR2_TAP_VAL, regs + AR71XX_DDR_REG_TAP_CTRL1);
|
|
}
|
|
}
|
|
|
|
void ddr_tap_tuning(void)
|
|
{
|
|
void __iomem *regs;
|
|
u32 val, pass, tap, cnt, tap_val, last, first;
|
|
|
|
regs = map_physmem(AR71XX_DDR_CTRL_BASE, AR71XX_DDR_CTRL_SIZE,
|
|
MAP_NOCACHE);
|
|
|
|
tap_val = readl(regs + AR71XX_DDR_REG_TAP_CTRL0);
|
|
first = DDR_TAP_MAGIC_VAL;
|
|
last = 0;
|
|
cnt = 0;
|
|
tap = 0;
|
|
|
|
do {
|
|
writel(tap, regs + AR71XX_DDR_REG_TAP_CTRL0);
|
|
writel(tap, regs + AR71XX_DDR_REG_TAP_CTRL1);
|
|
|
|
writel(DDR_BIST_COMP_CNT(8), regs + DDR_REG_BIST_COMP_ADDR_1);
|
|
writel(DDR_BIST_MASK_ADDR_VAL, regs + DDR_REG_BIST_MASK_ADDR_0);
|
|
writel(0xffff, regs + DDR_REG_BIST_COMP_AHB_GE0_1);
|
|
writel(0xffff, regs + DDR_REG_BIST_COMP_AHB_GE1_0);
|
|
writel(0xffff, regs + DDR_REG_BIST_COMP_AHB_GE1_1);
|
|
writel(0xffff, regs + DDR_REG_BIST_MASK_AHB_GE0_0);
|
|
writel(0xffff, regs + DDR_REG_BIST_MASK_AHB_GE0_1);
|
|
writel(0xffff, regs + DDR_REG_BIST_MASK_AHB_GE1_0);
|
|
writel(0xffff, regs + DDR_REG_BIST_MASK_AHB_GE1_1);
|
|
writel(0xffff, regs + DDR_REG_BIST_COMP_AHB_GE0_0);
|
|
|
|
/* Start BIST test */
|
|
writel(DDR_BIST_TEST_START, regs + DDR_REG_BIST);
|
|
|
|
do {
|
|
val = readl(regs + DDR_REG_BIST_STATUS);
|
|
} while (!(val & DDR_BIST_STATUS_DONE));
|
|
|
|
/* Stop BIST test */
|
|
writel(0, regs + DDR_REG_BIST);
|
|
|
|
pass = val & DDR_BIST_COMP_CNT_MASK;
|
|
pass ^= DDR_BIST_COMP_CNT(8);
|
|
if (!pass) {
|
|
if (first != DDR_TAP_MAGIC_VAL) {
|
|
last = tap;
|
|
} else {
|
|
first = tap;
|
|
last = tap;
|
|
}
|
|
cnt++;
|
|
}
|
|
tap++;
|
|
} while (tap < DDR_TAP_MAX_VAL);
|
|
|
|
if (cnt) {
|
|
tap_val = (first + last) / 2;
|
|
tap_val %= DDR_TAP_MAX_VAL;
|
|
}
|
|
|
|
writel(tap_val, regs + AR71XX_DDR_REG_TAP_CTRL0);
|
|
writel(tap_val, regs + AR71XX_DDR_REG_TAP_CTRL1);
|
|
}
|