diff options
Diffstat (limited to 'arch/arm/cpu/armv7/am33xx/emif4.c')
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/emif4.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/emif4.c b/arch/arm/cpu/armv7/am33xx/emif4.c new file mode 100644 index 0000000000..1318365a4a --- /dev/null +++ b/arch/arm/cpu/armv7/am33xx/emif4.c @@ -0,0 +1,201 @@ +/* + * emif4.c + * + * AM33XX emif4 configuration file + * + * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/ + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <common.h> +#include <asm/arch/cpu.h> +#include <asm/arch/ddr_defs.h> +#include <asm/arch/hardware.h> +#include <asm/arch/clock.h> +#include <asm/io.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct ddr_regs *ddrregs = (struct ddr_regs *)DDR_PHY_BASE_ADDR; +struct vtp_reg *vtpreg = (struct vtp_reg *)VTP0_CTRL_ADDR; +struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR; + + +int dram_init(void) +{ + /* dram_init must store complete ramsize in gd->ram_size */ + gd->ram_size = get_ram_size( + (void *)CONFIG_SYS_SDRAM_BASE, + CONFIG_MAX_RAM_BANK_SIZE); + return 0; +} + +void dram_init_banksize(void) +{ + gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE; + gd->bd->bi_dram[0].size = gd->ram_size; +} + + +#ifdef CONFIG_AM335X_CONFIG_DDR +static void data_macro_config(int dataMacroNum) +{ + struct ddr_data data; + + data.datardsratio0 = ((DDR2_RD_DQS<<30)|(DDR2_RD_DQS<<20) + |(DDR2_RD_DQS<<10)|(DDR2_RD_DQS<<0)); + data.datardsratio1 = DDR2_RD_DQS>>2; + data.datawdsratio0 = ((DDR2_WR_DQS<<30)|(DDR2_WR_DQS<<20) + |(DDR2_WR_DQS<<10)|(DDR2_WR_DQS<<0)); + data.datawdsratio1 = DDR2_WR_DQS>>2; + data.datawiratio0 = ((DDR2_PHY_WRLVL<<30)|(DDR2_PHY_WRLVL<<20) + |(DDR2_PHY_WRLVL<<10)|(DDR2_PHY_WRLVL<<0)); + data.datawiratio1 = DDR2_PHY_WRLVL>>2; + data.datagiratio0 = ((DDR2_PHY_GATELVL<<30)|(DDR2_PHY_GATELVL<<20) + |(DDR2_PHY_GATELVL<<10)|(DDR2_PHY_GATELVL<<0)); + data.datagiratio1 = DDR2_PHY_GATELVL>>2; + data.datafwsratio0 = ((DDR2_PHY_FIFO_WE<<30)|(DDR2_PHY_FIFO_WE<<20) + |(DDR2_PHY_FIFO_WE<<10)|(DDR2_PHY_FIFO_WE<<0)); + data.datafwsratio1 = DDR2_PHY_FIFO_WE>>2; + data.datawrsratio0 = ((DDR2_PHY_WR_DATA<<30)|(DDR2_PHY_WR_DATA<<20) + |(DDR2_PHY_WR_DATA<<10)|(DDR2_PHY_WR_DATA<<0)); + data.datawrsratio1 = DDR2_PHY_WR_DATA>>2; + data.datadldiff0 = PHY_DLL_LOCK_DIFF; + + config_ddr_data(dataMacroNum, &data); +} + +static void cmd_macro_config(void) +{ + struct cmd_control cmd; + + cmd.cmd0csratio = DDR2_RATIO; + cmd.cmd0csforce = CMD_FORCE; + cmd.cmd0csdelay = CMD_DELAY; + cmd.cmd0dldiff = DDR2_DLL_LOCK_DIFF; + cmd.cmd0iclkout = DDR2_INVERT_CLKOUT; + + cmd.cmd1csratio = DDR2_RATIO; + cmd.cmd1csforce = CMD_FORCE; + cmd.cmd1csdelay = CMD_DELAY; + cmd.cmd1dldiff = DDR2_DLL_LOCK_DIFF; + cmd.cmd1iclkout = DDR2_INVERT_CLKOUT; + + cmd.cmd2csratio = DDR2_RATIO; + cmd.cmd2csforce = CMD_FORCE; + cmd.cmd2csdelay = CMD_DELAY; + cmd.cmd2dldiff = DDR2_DLL_LOCK_DIFF; + cmd.cmd2iclkout = DDR2_INVERT_CLKOUT; + + config_cmd_ctrl(&cmd); + +} + +static void config_vtp(void) +{ + writel(readl(&vtpreg->vtp0ctrlreg) | VTP_CTRL_ENABLE, + &vtpreg->vtp0ctrlreg); + writel(readl(&vtpreg->vtp0ctrlreg) & (~VTP_CTRL_START_EN), + &vtpreg->vtp0ctrlreg); + writel(readl(&vtpreg->vtp0ctrlreg) | VTP_CTRL_START_EN, + &vtpreg->vtp0ctrlreg); + + /* Poll for READY */ + while ((readl(&vtpreg->vtp0ctrlreg) & VTP_CTRL_READY) != + VTP_CTRL_READY) + ; +} + +static void config_emif_ddr2(void) +{ + int i; + int ret; + struct sdram_config cfg; + struct sdram_timing tmg; + struct ddr_phy_control phyc; + + /*Program EMIF0 CFG Registers*/ + phyc.reg = EMIF_READ_LATENCY; + phyc.reg_sh = EMIF_READ_LATENCY; + phyc.reg2 = EMIF_READ_LATENCY; + + tmg.time1 = EMIF_TIM1; + tmg.time1_sh = EMIF_TIM1; + tmg.time2 = EMIF_TIM2; + tmg.time2_sh = EMIF_TIM2; + tmg.time3 = EMIF_TIM3; + tmg.time3_sh = EMIF_TIM3; + + cfg.sdrcr = EMIF_SDCFG; + cfg.sdrcr2 = EMIF_SDCFG; + cfg.refresh = 0x00004650; + cfg.refresh_sh = 0x00004650; + + /* Program EMIF instance */ + ret = config_ddr_phy(&phyc); + if (ret < 0) + printf("Couldn't configure phyc\n"); + + ret = config_sdram(&cfg); + if (ret < 0) + printf("Couldn't configure SDRAM\n"); + + ret = set_sdram_timings(&tmg); + if (ret < 0) + printf("Couldn't configure timings\n"); + + /* Delay */ + for (i = 0; i < 5000; i++) + ; + + cfg.refresh = EMIF_SDREF; + cfg.refresh_sh = EMIF_SDREF; + cfg.sdrcr = EMIF_SDCFG; + cfg.sdrcr2 = EMIF_SDCFG; + + ret = config_sdram(&cfg); + if (ret < 0) + printf("Couldn't configure SDRAM\n"); +} + +void config_ddr(void) +{ + int data_macro_0 = 0; + int data_macro_1 = 1; + struct ddr_ioctrl ioctrl; + + enable_emif_clocks(); + + config_vtp(); + + cmd_macro_config(); + + data_macro_config(data_macro_0); + data_macro_config(data_macro_1); + + writel(PHY_RANK0_DELAY, &ddrregs->dt0rdelays0); + writel(PHY_RANK0_DELAY, &ddrregs->dt1rdelays0); + + ioctrl.cmd1ctl = DDR_IOCTRL_VALUE; + ioctrl.cmd2ctl = DDR_IOCTRL_VALUE; + ioctrl.cmd3ctl = DDR_IOCTRL_VALUE; + ioctrl.data1ctl = DDR_IOCTRL_VALUE; + ioctrl.data2ctl = DDR_IOCTRL_VALUE; + + config_io_ctrl(&ioctrl); + + writel(readl(&ddrctrl->ddrioctrl) & 0xefffffff, &ddrctrl->ddrioctrl); + writel(readl(&ddrctrl->ddrckectrl) | 0x00000001, &ddrctrl->ddrckectrl); + + config_emif_ddr2(); +} +#endif |
