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https://github.com/AsahiLinux/u-boot
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6c4a1eba3f
This is a workaround for hardware erratum. Write the value of 63b2_0042h to EDDRTQCFG will optimal the memory controller performance. The value: 63b2_0042h comes from the hardware team. Signed-off-by: Yuan Yao <yao.yuan@freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/*
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* Copyright 2015 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/arch/clock.h>
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#include <asm/io.h>
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#include <asm/arch/immap_ls102xa.h>
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#include <asm/arch/ls102xa_soc.h>
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unsigned int get_soc_major_rev(void)
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{
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struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
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unsigned int svr, major;
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svr = in_be32(&gur->svr);
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major = SVR_MAJ(svr);
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return major;
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}
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int arch_soc_init(void)
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{
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struct ccsr_scfg *scfg = (struct ccsr_scfg *)CONFIG_SYS_FSL_SCFG_ADDR;
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struct ccsr_cci400 *cci = (struct ccsr_cci400 *)CONFIG_SYS_CCI400_ADDR;
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unsigned int major;
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#ifdef CONFIG_FSL_QSPI
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out_be32(&scfg->qspi_cfg, SCFG_QSPI_CLKSEL);
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#endif
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#ifdef CONFIG_FSL_DCU_FB
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out_be32(&scfg->pixclkcr, SCFG_PIXCLKCR_PXCKEN);
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#endif
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/* Configure Little endian for SAI, ASRC and SPDIF */
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out_be32(&scfg->endiancr, SCFG_ENDIANCR_LE);
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/*
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* Enable snoop requests and DVM message requests for
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* All the slave insterfaces.
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*/
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out_le32(&cci->slave[0].snoop_ctrl,
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CCI400_DVM_MESSAGE_REQ_EN | CCI400_SNOOP_REQ_EN);
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out_le32(&cci->slave[1].snoop_ctrl,
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CCI400_DVM_MESSAGE_REQ_EN | CCI400_SNOOP_REQ_EN);
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out_le32(&cci->slave[2].snoop_ctrl,
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CCI400_DVM_MESSAGE_REQ_EN | CCI400_SNOOP_REQ_EN);
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out_le32(&cci->slave[4].snoop_ctrl,
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CCI400_DVM_MESSAGE_REQ_EN | CCI400_SNOOP_REQ_EN);
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major = get_soc_major_rev();
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if (major == SOC_MAJOR_VER_1_0) {
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/*
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* Set CCI-400 Slave interface S1, S2 Shareable Override
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* Register All transactions are treated as non-shareable
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*/
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out_le32(&cci->slave[1].sha_ord, CCI400_SHAORD_NON_SHAREABLE);
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out_le32(&cci->slave[2].sha_ord, CCI400_SHAORD_NON_SHAREABLE);
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/* Workaround for the issue that DDR could not respond to
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* barrier transaction which is generated by executing DSB/ISB
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* instruction. Set CCI-400 control override register to
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* terminate the barrier transaction. After DDR is initialized,
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* allow barrier transaction to DDR again */
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out_le32(&cci->ctrl_ord, CCI400_CTRLORD_TERM_BARRIER);
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}
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/* Enable all the snoop signal for various masters */
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out_be32(&scfg->snpcnfgcr, SCFG_SNPCNFGCR_SEC_RD_WR |
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SCFG_SNPCNFGCR_DCU_RD_WR |
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SCFG_SNPCNFGCR_SATA_RD_WR |
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SCFG_SNPCNFGCR_USB3_RD_WR |
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SCFG_SNPCNFGCR_DBG_RD_WR |
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SCFG_SNPCNFGCR_EDMA_SNP);
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/*
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* Memory controller require a register write before being enabled.
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* Affects: DDR
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* Register: EDDRTQCFG
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* Description: Memory controller performance is not optimal with
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* default internal target queue register values.
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* Workaround: Write a value of 63b2_0042h to address: 157_020Ch.
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*/
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out_be32(&scfg->eddrtqcfg, 0x63b20042);
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return 0;
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}
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