diff options
Diffstat (limited to 'board/compulab/cm_t335/spl.c')
-rw-r--r-- | board/compulab/cm_t335/spl.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/board/compulab/cm_t335/spl.c b/board/compulab/cm_t335/spl.c new file mode 100644 index 0000000..b3b150a --- /dev/null +++ b/board/compulab/cm_t335/spl.c @@ -0,0 +1,114 @@ +/* + * SPL specific code for Compulab CM-T335 board + * + * Board functions for Compulab CM-T335 board + * + * Copyright (C) 2013, Compulab Ltd - http://compulab.co.il/ + * + * Author: Ilya Ledvich <ilya@compulab.co.il> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <errno.h> + +#include <asm/arch/ddr_defs.h> +#include <asm/arch/clock.h> +#include <asm/arch/clocks_am33xx.h> +#include <asm/arch/sys_proto.h> +#include <asm/arch/hardware_am33xx.h> +#include <asm/sizes.h> + +const struct ctrl_ioregs ioregs = { + .cm0ioctl = MT41J128MJT125_IOCTRL_VALUE, + .cm1ioctl = MT41J128MJT125_IOCTRL_VALUE, + .cm2ioctl = MT41J128MJT125_IOCTRL_VALUE, + .dt0ioctl = MT41J128MJT125_IOCTRL_VALUE, + .dt1ioctl = MT41J128MJT125_IOCTRL_VALUE, +}; + +static const struct ddr_data ddr3_data = { + .datardsratio0 = MT41J128MJT125_RD_DQS, + .datawdsratio0 = MT41J128MJT125_WR_DQS, + .datafwsratio0 = MT41J128MJT125_PHY_FIFO_WE, + .datawrsratio0 = MT41J128MJT125_PHY_WR_DATA, +}; + +static const struct cmd_control ddr3_cmd_ctrl_data = { + .cmd0csratio = MT41J128MJT125_RATIO, + .cmd0iclkout = MT41J128MJT125_INVERT_CLKOUT, + + .cmd1csratio = MT41J128MJT125_RATIO, + .cmd1iclkout = MT41J128MJT125_INVERT_CLKOUT, + + .cmd2csratio = MT41J128MJT125_RATIO, + .cmd2iclkout = MT41J128MJT125_INVERT_CLKOUT, +}; + +static struct emif_regs ddr3_emif_reg_data = { + .sdram_config = MT41J128MJT125_EMIF_SDCFG, + .ref_ctrl = MT41J128MJT125_EMIF_SDREF, + .sdram_tim1 = MT41J128MJT125_EMIF_TIM1, + .sdram_tim2 = MT41J128MJT125_EMIF_TIM2, + .sdram_tim3 = MT41J128MJT125_EMIF_TIM3, + .zq_config = MT41J128MJT125_ZQ_CFG, + .emif_ddr_phy_ctlr_1 = MT41J128MJT125_EMIF_READ_LATENCY | + PHY_EN_DYN_PWRDN, +}; + +const struct dpll_params dpll_ddr = { +/* M N M2 M3 M4 M5 M6 */ + 303, (V_OSCK/1000000) - 1, 1, -1, -1, -1, -1}; + +void am33xx_spl_board_init(void) +{ + struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE; + + /* Get the frequency */ + dpll_mpu_opp100.m = am335x_get_efuse_mpu_max_freq(cdev); + + /* Set CORE Frequencies to OPP100 */ + do_setup_dpll(&dpll_core_regs, &dpll_core_opp100); + + /* Set MPU Frequency to what we detected now that voltages are set */ + do_setup_dpll(&dpll_mpu_regs, &dpll_mpu_opp100); +} + +const struct dpll_params *get_dpll_ddr_params(void) +{ + return &dpll_ddr; +} + +static void probe_sdram_size(long size) +{ + switch (size) { + case SZ_512M: + ddr3_emif_reg_data.sdram_config = MT41J256MJT125_EMIF_SDCFG; + break; + case SZ_256M: + ddr3_emif_reg_data.sdram_config = MT41J128MJT125_EMIF_SDCFG; + break; + case SZ_128M: + ddr3_emif_reg_data.sdram_config = MT41J64MJT125_EMIF_SDCFG; + break; + default: + puts("Failed configuring DRAM, resetting...\n\n"); + reset_cpu(0); + } + debug("%s: setting DRAM size to %ldM\n", __func__, size >> 20); + config_ddr(303, &ioregs, &ddr3_data, + &ddr3_cmd_ctrl_data, &ddr3_emif_reg_data, 0); +} + +void sdram_init(void) +{ + long size = SZ_1G; + + do { + size = size / 2; + probe_sdram_size(size); + } while (get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, size) < size); + + return; +} |