88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*
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* Copyright 2018 NXP
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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 <linux/kernel.h>
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#include <asm/arch/imx8m_ddr.h>
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#include <asm/arch/lpddr4_define.h>
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void ddr_cfg_phy(struct dram_timing_info *dram_timing)
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{
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struct dram_cfg_param *dram_cfg;
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struct dram_fsp_msg *fsp_msg;
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unsigned int num;
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int i = 0;
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int j = 0;
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/* initialize PHY configuration */
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dram_cfg = dram_timing->ddrphy_cfg;
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num = dram_timing->ddrphy_cfg_num;
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for (i = 0; i < num; i++) {
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/* config phy reg */
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dwc_ddrphy_apb_wr(dram_cfg->reg, dram_cfg->val);
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dram_cfg++;
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}
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/* load the frequency setpoint message block config */
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fsp_msg = dram_timing->fsp_msg;
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for (i = 0; i < dram_timing->fsp_msg_num; i++) {
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printf("DRAM PHY training for %dMTS\n", fsp_msg->drate);
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/* set dram PHY input clocks to desired frequency */
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ddrphy_init_set_dfi_clk(fsp_msg->drate);
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/* load the dram training firmware image */
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dwc_ddrphy_apb_wr(0xd0000,0x0);
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ddr_load_train_firmware(fsp_msg->fw_type);
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/* load the frequency set point message block parameter */
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dram_cfg = fsp_msg->fsp_cfg;
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num = fsp_msg->fsp_cfg_num;
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for (j = 0; j < num; j++) {
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dwc_ddrphy_apb_wr(dram_cfg->reg, dram_cfg->val);
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dram_cfg++;
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}
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/*
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* -------------------- excute the firmware --------------------
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* Running the firmware is a simply process to taking the
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* PMU out of reset and stall, then the firwmare will be run
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* 1. reset the PMU;
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* 2. begin the excution;
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* 3. wait for the training done;
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* 4. read the message block result.
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* -------------------------------------------------------------
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*/
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dwc_ddrphy_apb_wr(0xd0000, 0x1);
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dwc_ddrphy_apb_wr(0xd0099, 0x9);
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dwc_ddrphy_apb_wr(0xd0099, 0x1);
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dwc_ddrphy_apb_wr(0xd0099, 0x0);
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/* Wait for the training firmware to complete */
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wait_ddrphy_training_complete();
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/* Halt the microcontroller. */
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dwc_ddrphy_apb_wr(0xd0099, 0x1);
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/* Read the Message Block results */
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dwc_ddrphy_apb_wr(0xd0000, 0x0);
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ddrphy_init_read_msg_block(fsp_msg->fw_type);
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dwc_ddrphy_apb_wr(0xd0000, 0x1);
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fsp_msg++;
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}
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/* Load PHY Init Engine Image */
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dram_cfg = dram_timing->ddrphy_pie;
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num = dram_timing->ddrphy_pie_num;
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for (i = 0; i < num; i++) {
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dwc_ddrphy_apb_wr(dram_cfg->reg, dram_cfg->val);
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dram_cfg++;
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}
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/* save the ddr PHY trained CSR in memory for low power use */
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ddrphy_trained_csr_save(dram_timing->ddrphy_trained_csr,
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dram_timing->ddrphy_trained_csr_num);
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}
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