board/technexion/pico-imx6ul/spl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2
   3 #include <cpu_func.h>
   4 #include <asm/arch/clock.h>
   5 #include <asm/arch/iomux.h>
   6 #include <asm/arch/imx-regs.h>
   7 #include <asm/arch/crm_regs.h>
   8 #include <asm/arch/mx6ul_pins.h>
   9 #include <asm/arch/mx6-pins.h>
  10 #include <asm/arch/sys_proto.h>
  11 #include <asm/gpio.h>
  12 #include <asm/mach-imx/iomux-v3.h>
  13 #include <asm/mach-imx/boot_mode.h>
  14 #include <fsl_esdhc_imx.h>
  15 #include <linux/libfdt.h>
  16 #include <spl.h>
  17
  18 #if defined(CONFIG_SPL_BUILD)
  19
  20 #ifdef CONFIG_SPL_OS_BOOT
  21 int spl_start_uboot(void)
  22 {
  23         /* Break into full U-Boot on 'c' */
  24         if (serial_tstc() && serial_getc() == 'c')
  25                 return 1;
  26
  27         return 0;
  28 }
  29 #endif
  30
  31 #include <asm/arch/mx6-ddr.h>
  32
  33 static struct mx6ul_iomux_grp_regs mx6_grp_ioregs = {
  34         .grp_addds = 0x00000030,
  35         .grp_ddrmode_ctl = 0x00020000,
  36         .grp_b0ds = 0x00000030,
  37         .grp_ctlds = 0x00000030,
  38         .grp_b1ds = 0x00000030,
  39         .grp_ddrpke = 0x00000000,
  40         .grp_ddrmode = 0x00020000,
  41         .grp_ddr_type = 0x00080000,
  42 };
  43
  44 static struct mx6ul_iomux_ddr_regs mx6_ddr_ioregs = {
  45         .dram_dqm0 = 0x00000030,
  46         .dram_dqm1 = 0x00000030,
  47         .dram_ras = 0x00000030,
  48         .dram_cas = 0x00000030,
  49         .dram_odt0 = 0x00000030,
  50         .dram_odt1 = 0x00000030,
  51         .dram_sdba2 = 0x00000000,
  52         .dram_sdclk_0 = 0x00000030,
  53         .dram_sdqs0 = 0x00000030,
  54         .dram_sdqs1 = 0x00000030,
  55         .dram_reset = 0x00000030,
  56 };
  57
  58 static struct mx6_mmdc_calibration mx6_mmcd_calib = {
  59         .p0_mpwldectrl0 = 0x00000000,
  60         .p0_mpdgctrl0 = 0x01380134,
  61         .p0_mprddlctl = 0x40404244,
  62         .p0_mpwrdlctl = 0x40405050,
  63 };
  64
  65 static struct mx6_ddr_sysinfo ddr_sysinfo = {
  66         .dsize          = 0,
  67         .cs1_mirror     = 0,
  68         .cs_density     = 32,
  69         .ncs            = 1,
  70         .bi_on          = 1,
  71         .rtt_nom        = 1,
  72         .rtt_wr         = 0,
  73         .ralat          = 5,
  74         .walat          = 0,
  75         .mif3_mode      = 3,
  76         .rst_to_cke     = 0x23,
  77         .sde_to_rst     = 0x10,
  78         .refsel = 1,
  79         .refr = 3,
  80 };
  81
  82 static struct mx6_ddr3_cfg mem_ddr = {
  83         .mem_speed = 1333,
  84         .density = 2,
  85         .width = 16,
  86         .banks = 8,
  87         .coladdr = 10,
  88         .pagesz = 2,
  89         .trcd = 1350,
  90         .trcmin = 4950,
  91         .trasmin = 3600,
  92 };
  93
  94 static void ccgr_init(void)
  95 {
  96         struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
  97
  98         writel(0xFFFFFFFF, &ccm->CCGR0);
  99         writel(0xFFFFFFFF, &ccm->CCGR1);
 100         writel(0xFFFFFFFF, &ccm->CCGR2);
 101         writel(0xFFFFFFFF, &ccm->CCGR3);
 102         writel(0xFFFFFFFF, &ccm->CCGR4);
 103         writel(0xFFFFFFFF, &ccm->CCGR5);
 104         writel(0xFFFFFFFF, &ccm->CCGR6);
 105 }
 106
 107 static void imx6ul_spl_dram_cfg_size(u32 ram_size)
 108 {
 109         if (ram_size == SZ_256M)
 110                 mem_ddr.rowaddr = 14;
 111         else
 112                 mem_ddr.rowaddr = 15;
 113
 114         mx6ul_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs);
 115         mx6_dram_cfg(&ddr_sysinfo, &mx6_mmcd_calib, &mem_ddr);
 116 }
 117
 118 static void imx6ul_spl_dram_cfg(void)
 119 {
 120         ulong ram_size_test, ram_size = 0;
 121
 122         for (ram_size = SZ_512M; ram_size >= SZ_256M; ram_size >>= 1) {
 123                 imx6ul_spl_dram_cfg_size(ram_size);
 124                 ram_size_test = get_ram_size((long int *)PHYS_SDRAM, ram_size);
 125                 if (ram_size_test == ram_size)
 126                         break;
 127         }
 128
 129         if (ram_size < SZ_256M) {
 130                 puts("ERROR: DRAM size detection failed\n");
 131                 hang();
 132         }
 133 }
 134
 135 void board_init_f(ulong dummy)
 136 {
 137         ccgr_init();
 138         arch_cpu_init();
 139         board_early_init_f();
 140         timer_init();
 141         preloader_console_init();
 142         imx6ul_spl_dram_cfg();
 143         memset(__bss_start, 0, __bss_end - __bss_start);
 144         board_init_r(NULL, 0);
 145 }
 146
 147 void reset_cpu(ulong addr)
 148 {
 149 }
 150
 151 #define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |             \
 152         PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |               \
 153         PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
 154
 155 static iomux_v3_cfg_t const usdhc1_pads[] = {
 156         MX6_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 157         MX6_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 158         MX6_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 159         MX6_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 160         MX6_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 161         MX6_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 162         MX6_PAD_NAND_READY_B__USDHC1_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 163         MX6_PAD_NAND_CE0_B__USDHC1_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 164         MX6_PAD_NAND_CE1_B__USDHC1_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 165         MX6_PAD_NAND_CLE__USDHC1_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 166 };
 167
 168 static struct fsl_esdhc_cfg usdhc_cfg[1] = {
 169         {USDHC1_BASE_ADDR},
 170 };
 171
 172 int board_mmc_getcd(struct mmc *mmc)
 173 {
 174         return 1;
 175 }
 176
 177 int board_mmc_init(bd_t *bis)
 178 {
 179         imx_iomux_v3_setup_multiple_pads(usdhc1_pads, ARRAY_SIZE(usdhc1_pads));
 180         usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
 181         return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
 182 }
 183 #endif