arch/arm/cpu/armv7/am33xx/emif4.c

   1 /*
   2  * emif4.c
   3  *
   4  * AM33XX emif4 configuration file
   5  *
   6  * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <common.h>
  20 #include <asm/arch/cpu.h>
  21 #include <asm/arch/ddr_defs.h>
  22 #include <asm/arch/hardware.h>
  23 #include <asm/arch/clock.h>
  24 #include <asm/io.h>
  25
  26 DECLARE_GLOBAL_DATA_PTR;
  27
  28 struct ddr_regs *ddrregs = (struct ddr_regs *)DDR_PHY_BASE_ADDR;
  29 struct vtp_reg *vtpreg = (struct vtp_reg *)VTP0_CTRL_ADDR;
  30 struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR;
  31
  32
  33 int dram_init(void)
  34 {
  35         /* dram_init must store complete ramsize in gd->ram_size */
  36         gd->ram_size = get_ram_size(
  37                         (void *)CONFIG_SYS_SDRAM_BASE,
  38                         CONFIG_MAX_RAM_BANK_SIZE);
  39         return 0;
  40 }
  41
  42 void dram_init_banksize(void)
  43 {
  44         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
  45         gd->bd->bi_dram[0].size = gd->ram_size;
  46 }
  47
  48
  49 #ifdef CONFIG_SPL_BUILD
  50 static void data_macro_config(int dataMacroNum)
  51 {
  52         struct ddr_data data;
  53
  54         data.datardsratio0 = ((DDR2_RD_DQS<<30)|(DDR2_RD_DQS<<20)
  55                                 |(DDR2_RD_DQS<<10)|(DDR2_RD_DQS<<0));
  56         data.datardsratio1 = DDR2_RD_DQS>>2;
  57         data.datawdsratio0 = ((DDR2_WR_DQS<<30)|(DDR2_WR_DQS<<20)
  58                                 |(DDR2_WR_DQS<<10)|(DDR2_WR_DQS<<0));
  59         data.datawdsratio1 = DDR2_WR_DQS>>2;
  60         data.datawiratio0 = ((DDR2_PHY_WRLVL<<30)|(DDR2_PHY_WRLVL<<20)
  61                                 |(DDR2_PHY_WRLVL<<10)|(DDR2_PHY_WRLVL<<0));
  62         data.datawiratio1 = DDR2_PHY_WRLVL>>2;
  63         data.datagiratio0 = ((DDR2_PHY_GATELVL<<30)|(DDR2_PHY_GATELVL<<20)
  64                                 |(DDR2_PHY_GATELVL<<10)|(DDR2_PHY_GATELVL<<0));
  65         data.datagiratio1 = DDR2_PHY_GATELVL>>2;
  66         data.datafwsratio0 = ((DDR2_PHY_FIFO_WE<<30)|(DDR2_PHY_FIFO_WE<<20)
  67                                 |(DDR2_PHY_FIFO_WE<<10)|(DDR2_PHY_FIFO_WE<<0));
  68         data.datafwsratio1 = DDR2_PHY_FIFO_WE>>2;
  69         data.datawrsratio0 = ((DDR2_PHY_WR_DATA<<30)|(DDR2_PHY_WR_DATA<<20)
  70                                 |(DDR2_PHY_WR_DATA<<10)|(DDR2_PHY_WR_DATA<<0));
  71         data.datawrsratio1 = DDR2_PHY_WR_DATA>>2;
  72         data.datadldiff0 = PHY_DLL_LOCK_DIFF;
  73
  74         config_ddr_data(dataMacroNum, &data);
  75 }
  76
  77 static void cmd_macro_config(void)
  78 {
  79         struct cmd_control cmd;
  80
  81         cmd.cmd0csratio = DDR2_RATIO;
  82         cmd.cmd0csforce = CMD_FORCE;
  83         cmd.cmd0csdelay = CMD_DELAY;
  84         cmd.cmd0dldiff = DDR2_DLL_LOCK_DIFF;
  85         cmd.cmd0iclkout = DDR2_INVERT_CLKOUT;
  86
  87         cmd.cmd1csratio = DDR2_RATIO;
  88         cmd.cmd1csforce = CMD_FORCE;
  89         cmd.cmd1csdelay = CMD_DELAY;
  90         cmd.cmd1dldiff = DDR2_DLL_LOCK_DIFF;
  91         cmd.cmd1iclkout = DDR2_INVERT_CLKOUT;
  92
  93         cmd.cmd2csratio = DDR2_RATIO;
  94         cmd.cmd2csforce = CMD_FORCE;
  95         cmd.cmd2csdelay = CMD_DELAY;
  96         cmd.cmd2dldiff = DDR2_DLL_LOCK_DIFF;
  97         cmd.cmd2iclkout = DDR2_INVERT_CLKOUT;
  98
  99         config_cmd_ctrl(&cmd);
 100
 101 }
 102
 103 static void config_vtp(void)
 104 {
 105         writel(readl(&vtpreg->vtp0ctrlreg) | VTP_CTRL_ENABLE,
 106                         &vtpreg->vtp0ctrlreg);
 107         writel(readl(&vtpreg->vtp0ctrlreg) & (~VTP_CTRL_START_EN),
 108                         &vtpreg->vtp0ctrlreg);
 109         writel(readl(&vtpreg->vtp0ctrlreg) | VTP_CTRL_START_EN,
 110                         &vtpreg->vtp0ctrlreg);
 111
 112         /* Poll for READY */
 113         while ((readl(&vtpreg->vtp0ctrlreg) & VTP_CTRL_READY) !=
 114                         VTP_CTRL_READY)
 115                 ;
 116 }
 117
 118 static void config_emif_ddr2(void)
 119 {
 120         int i;
 121         int ret;
 122         struct sdram_config cfg;
 123         struct sdram_timing tmg;
 124         struct ddr_phy_control phyc;
 125
 126         /*Program EMIF0 CFG Registers*/
 127         phyc.reg = EMIF_READ_LATENCY;
 128         phyc.reg_sh = EMIF_READ_LATENCY;
 129         phyc.reg2 = EMIF_READ_LATENCY;
 130
 131         tmg.time1 = EMIF_TIM1;
 132         tmg.time1_sh = EMIF_TIM1;
 133         tmg.time2 = EMIF_TIM2;
 134         tmg.time2_sh = EMIF_TIM2;
 135         tmg.time3 = EMIF_TIM3;
 136         tmg.time3_sh = EMIF_TIM3;
 137
 138         cfg.sdrcr = EMIF_SDCFG;
 139         cfg.sdrcr2 = EMIF_SDCFG;
 140         cfg.refresh = 0x00004650;
 141         cfg.refresh_sh = 0x00004650;
 142
 143         /* Program EMIF instance */
 144         ret = config_ddr_phy(&phyc);
 145         if (ret < 0)
 146                 printf("Couldn't configure phyc\n");
 147
 148         ret = config_sdram(&cfg);
 149         if (ret < 0)
 150                 printf("Couldn't configure SDRAM\n");
 151
 152         ret = set_sdram_timings(&tmg);
 153         if (ret < 0)
 154                 printf("Couldn't configure timings\n");
 155
 156         /* Delay */
 157         for (i = 0; i < 5000; i++)
 158                 ;
 159
 160         cfg.refresh = EMIF_SDREF;
 161         cfg.refresh_sh = EMIF_SDREF;
 162         cfg.sdrcr = EMIF_SDCFG;
 163         cfg.sdrcr2 = EMIF_SDCFG;
 164
 165         ret = config_sdram(&cfg);
 166         if (ret < 0)
 167                 printf("Couldn't configure SDRAM\n");
 168 }
 169
 170 void config_ddr(void)
 171 {
 172         int data_macro_0 = 0;
 173         int data_macro_1 = 1;
 174         struct ddr_ioctrl ioctrl;
 175
 176         enable_emif_clocks();
 177
 178         config_vtp();
 179
 180         cmd_macro_config();
 181
 182         data_macro_config(data_macro_0);
 183         data_macro_config(data_macro_1);
 184
 185         writel(PHY_RANK0_DELAY, &ddrregs->dt0rdelays0);
 186         writel(PHY_RANK0_DELAY, &ddrregs->dt1rdelays0);
 187
 188         ioctrl.cmd1ctl = DDR_IOCTRL_VALUE;
 189         ioctrl.cmd2ctl = DDR_IOCTRL_VALUE;
 190         ioctrl.cmd3ctl = DDR_IOCTRL_VALUE;
 191         ioctrl.data1ctl = DDR_IOCTRL_VALUE;
 192         ioctrl.data2ctl = DDR_IOCTRL_VALUE;
 193
 194         config_io_ctrl(&ioctrl);
 195
 196         writel(readl(&ddrctrl->ddrioctrl) & 0xefffffff, &ddrctrl->ddrioctrl);
 197         writel(readl(&ddrctrl->ddrckectrl) | 0x00000001, &ddrctrl->ddrckectrl);
 198
 199         config_emif_ddr2();
 200 }
 201 #endif