board/compulab/cm_t335/spl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * SPL specific code for Compulab CM-T335 board
   4  *
   5  * Board functions for Compulab CM-T335 board
   6  *
   7  * Copyright (C) 2013, Compulab Ltd - http://compulab.co.il/
   8  *
   9  * Author: Ilya Ledvich <ilya@compulab.co.il>
  10  */
  11
  12 #include <common.h>
  13 #include <cpu_func.h>
  14 #include <errno.h>
  15 #include <init.h>
  16 #include <log.h>
  17
  18 #include <asm/arch/ddr_defs.h>
  19 #include <asm/arch/clock.h>
  20 #include <asm/arch/clocks_am33xx.h>
  21 #include <asm/arch/sys_proto.h>
  22 #include <asm/arch/hardware_am33xx.h>
  23 #include <linux/sizes.h>
  24
  25 const struct ctrl_ioregs ioregs = {
  26         .cm0ioctl               = MT41J128MJT125_IOCTRL_VALUE,
  27         .cm1ioctl               = MT41J128MJT125_IOCTRL_VALUE,
  28         .cm2ioctl               = MT41J128MJT125_IOCTRL_VALUE,
  29         .dt0ioctl               = MT41J128MJT125_IOCTRL_VALUE,
  30         .dt1ioctl               = MT41J128MJT125_IOCTRL_VALUE,
  31 };
  32
  33 static const struct ddr_data ddr3_data = {
  34         .datardsratio0          = MT41J128MJT125_RD_DQS,
  35         .datawdsratio0          = MT41J128MJT125_WR_DQS,
  36         .datafwsratio0          = MT41J128MJT125_PHY_FIFO_WE,
  37         .datawrsratio0          = MT41J128MJT125_PHY_WR_DATA,
  38 };
  39
  40 static const struct cmd_control ddr3_cmd_ctrl_data = {
  41         .cmd0csratio            = MT41J128MJT125_RATIO,
  42         .cmd0iclkout            = MT41J128MJT125_INVERT_CLKOUT,
  43
  44         .cmd1csratio            = MT41J128MJT125_RATIO,
  45         .cmd1iclkout            = MT41J128MJT125_INVERT_CLKOUT,
  46
  47         .cmd2csratio            = MT41J128MJT125_RATIO,
  48         .cmd2iclkout            = MT41J128MJT125_INVERT_CLKOUT,
  49 };
  50
  51 static struct emif_regs ddr3_emif_reg_data = {
  52         .sdram_config           = MT41J128MJT125_EMIF_SDCFG,
  53         .ref_ctrl               = MT41J128MJT125_EMIF_SDREF,
  54         .sdram_tim1             = MT41J128MJT125_EMIF_TIM1,
  55         .sdram_tim2             = MT41J128MJT125_EMIF_TIM2,
  56         .sdram_tim3             = MT41J128MJT125_EMIF_TIM3,
  57         .zq_config              = MT41J128MJT125_ZQ_CFG,
  58         .emif_ddr_phy_ctlr_1    = MT41J128MJT125_EMIF_READ_LATENCY |
  59                                         PHY_EN_DYN_PWRDN,
  60 };
  61
  62 const struct dpll_params dpll_ddr = {
  63 /*       M           N            M2  M3  M4  M5  M6 */
  64         303, (V_OSCK/1000000) - 1, 1, -1, -1, -1, -1};
  65
  66 void am33xx_spl_board_init(void)
  67 {
  68         struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
  69
  70         /* Get the frequency */
  71         dpll_mpu_opp100.m = am335x_get_efuse_mpu_max_freq(cdev);
  72
  73         /* Set CORE Frequencies to OPP100 */
  74         do_setup_dpll(&dpll_core_regs, &dpll_core_opp100);
  75
  76         /* Set MPU Frequency to what we detected now that voltages are set */
  77         do_setup_dpll(&dpll_mpu_regs, &dpll_mpu_opp100);
  78 }
  79
  80 const struct dpll_params *get_dpll_ddr_params(void)
  81 {
  82         return &dpll_ddr;
  83 }
  84
  85 static void probe_sdram_size(long size)
  86 {
  87         switch (size) {
  88         case SZ_512M:
  89                 ddr3_emif_reg_data.sdram_config = MT41J256MJT125_EMIF_SDCFG;
  90                 break;
  91         case SZ_256M:
  92                 ddr3_emif_reg_data.sdram_config = MT41J128MJT125_EMIF_SDCFG;
  93                 break;
  94         case SZ_128M:
  95                 ddr3_emif_reg_data.sdram_config = MT41J64MJT125_EMIF_SDCFG;
  96                 break;
  97         default:
  98                 puts("Failed configuring DRAM, resetting...\n\n");
  99                 reset_cpu(0);
 100         }
 101         debug("%s: setting DRAM size to %ldM\n", __func__, size >> 20);
 102         config_ddr(303, &ioregs, &ddr3_data,
 103                    &ddr3_cmd_ctrl_data, &ddr3_emif_reg_data, 0);
 104 }
 105
 106 void sdram_init(void)
 107 {
 108         long size = SZ_1G;
 109
 110         do {
 111                 size = size / 2;
 112                 probe_sdram_size(size);
 113         } while (get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, size) < size);
 114
 115         return;
 116 }