85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2008 Freescale Semiconductor, Inc.
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*/
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#include <common.h>
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#include <log.h>
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#include <asm/io.h>
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#include <fsl_ddr_sdram.h>
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#include <linux/delay.h>
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#if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
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#error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
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#endif
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void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
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unsigned int ctrl_num, int step)
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{
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unsigned int i;
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struct ccsr_ddr __iomem *ddr;
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switch (ctrl_num) {
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case 0:
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ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR;
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break;
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case 1:
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ddr = (void *)CONFIG_SYS_FSL_DDR2_ADDR;
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break;
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default:
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printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
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return;
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}
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for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
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if (i == 0) {
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out_be32(&ddr->cs0_bnds, regs->cs[i].bnds);
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out_be32(&ddr->cs0_config, regs->cs[i].config);
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} else if (i == 1) {
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out_be32(&ddr->cs1_bnds, regs->cs[i].bnds);
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out_be32(&ddr->cs1_config, regs->cs[i].config);
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} else if (i == 2) {
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out_be32(&ddr->cs2_bnds, regs->cs[i].bnds);
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out_be32(&ddr->cs2_config, regs->cs[i].config);
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} else if (i == 3) {
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out_be32(&ddr->cs3_bnds, regs->cs[i].bnds);
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out_be32(&ddr->cs3_config, regs->cs[i].config);
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}
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}
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out_be32(&ddr->timing_cfg_3, regs->timing_cfg_3);
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out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0);
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out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1);
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out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
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out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
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out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode);
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out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2);
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out_be32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl);
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out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
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out_be32(&ddr->sdram_data_init, regs->ddr_data_init);
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out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
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out_be32(&ddr->init_addr, regs->ddr_init_addr);
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out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr);
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debug("before go\n");
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/*
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* 200 painful micro-seconds must elapse between
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* the DDR clock setup and the DDR config enable.
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*/
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udelay(200);
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asm volatile("sync;isync");
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out_be32(&ddr->sdram_cfg, regs->ddr_sdram_cfg);
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/*
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* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done
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*/
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while (in_be32(&ddr->sdram_cfg_2) & 0x10) {
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udelay(10000); /* throttle polling rate */
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}
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}
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