1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright 2008 Freescale Semiconductor, Inc. 4 */ 5 6 #include <common.h> 7 #include <asm/io.h> 8 #include <fsl_ddr_sdram.h> 9 10 #if (CONFIG_CHIP_SELECTS_PER_CTRL > 4) 11 #error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL 12 #endif 13 14 void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, 15 unsigned int ctrl_num, int step) 16 { 17 unsigned int i; 18 struct ccsr_ddr __iomem *ddr; 19 20 switch (ctrl_num) { 21 case 0: 22 ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR; 23 break; 24 case 1: 25 ddr = (void *)CONFIG_SYS_FSL_DDR2_ADDR; 26 break; 27 default: 28 printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num); 29 return; 30 } 31 32 for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { 33 if (i == 0) { 34 out_be32(&ddr->cs0_bnds, regs->cs[i].bnds); 35 out_be32(&ddr->cs0_config, regs->cs[i].config); 36 37 } else if (i == 1) { 38 out_be32(&ddr->cs1_bnds, regs->cs[i].bnds); 39 out_be32(&ddr->cs1_config, regs->cs[i].config); 40 41 } else if (i == 2) { 42 out_be32(&ddr->cs2_bnds, regs->cs[i].bnds); 43 out_be32(&ddr->cs2_config, regs->cs[i].config); 44 45 } else if (i == 3) { 46 out_be32(&ddr->cs3_bnds, regs->cs[i].bnds); 47 out_be32(&ddr->cs3_config, regs->cs[i].config); 48 } 49 } 50 51 out_be32(&ddr->timing_cfg_3, regs->timing_cfg_3); 52 out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0); 53 out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1); 54 out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2); 55 out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2); 56 out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode); 57 out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2); 58 out_be32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl); 59 out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval); 60 out_be32(&ddr->sdram_data_init, regs->ddr_data_init); 61 out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl); 62 out_be32(&ddr->init_addr, regs->ddr_init_addr); 63 out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr); 64 65 debug("before go\n"); 66 67 /* 68 * 200 painful micro-seconds must elapse between 69 * the DDR clock setup and the DDR config enable. 70 */ 71 udelay(200); 72 asm volatile("sync;isync"); 73 74 out_be32(&ddr->sdram_cfg, regs->ddr_sdram_cfg); 75 76 /* 77 * Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done 78 */ 79 while (in_be32(&ddr->sdram_cfg_2) & 0x10) { 80 udelay(10000); /* throttle polling rate */ 81 } 82 } 83