arch/arm/mach-imx/mx6/litesom.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
   4  * Copyright (C) 2016 Grinn
   5  */
   6
   7 #include <init.h>
   8 #include <asm/arch/clock.h>
   9 #include <asm/arch/iomux.h>
  10 #include <asm/arch/imx-regs.h>
  11 #include <asm/arch/crm_regs.h>
  12 #include <asm/arch/mx6ul_pins.h>
  13 #include <asm/arch/mx6-pins.h>
  14 #include <asm/arch/sys_proto.h>
  15 #include <asm/gpio.h>
  16 #include <asm/mach-imx/iomux-v3.h>
  17 #include <asm/mach-imx/boot_mode.h>
  18 #include <asm/io.h>
  19 #include <common.h>
  20 #include <fsl_esdhc_imx.h>
  21 #include <linux/delay.h>
  22 #include <linux/sizes.h>
  23 #include <mmc.h>
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 #define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |             \
  28         PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |               \
  29         PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
  30
  31 int dram_init(void)
  32 {
  33         gd->ram_size = imx_ddr_size();
  34
  35         return 0;
  36 }
  37
  38 static iomux_v3_cfg_t const emmc_pads[] = {
  39         MX6_PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  40         MX6_PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  41         MX6_PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  42         MX6_PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  43         MX6_PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  44         MX6_PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  45         MX6_PAD_NAND_DATA04__USDHC2_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  46         MX6_PAD_NAND_DATA05__USDHC2_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  47         MX6_PAD_NAND_DATA06__USDHC2_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  48         MX6_PAD_NAND_DATA07__USDHC2_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  49
  50         /* RST_B */
  51         MX6_PAD_NAND_ALE__GPIO4_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
  52 };
  53
  54 #ifdef CONFIG_FSL_ESDHC_IMX
  55 static struct fsl_esdhc_cfg emmc_cfg = {USDHC2_BASE_ADDR, 0, 8};
  56
  57 #define EMMC_PWR_GPIO   IMX_GPIO_NR(4, 10)
  58
  59 int litesom_mmc_init(bd_t *bis)
  60 {
  61         int ret;
  62
  63         /* eMMC */
  64         imx_iomux_v3_setup_multiple_pads(emmc_pads, ARRAY_SIZE(emmc_pads));
  65         gpio_direction_output(EMMC_PWR_GPIO, 0);
  66         udelay(500);
  67         gpio_direction_output(EMMC_PWR_GPIO, 1);
  68         emmc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
  69
  70         ret = fsl_esdhc_initialize(bis, &emmc_cfg);
  71         if (ret) {
  72                 printf("Warning: failed to initialize mmc dev 1 (eMMC)\n");
  73                 return ret;
  74         }
  75
  76         return 0;
  77 }
  78 #endif
  79
  80 #ifdef CONFIG_SPL_BUILD
  81 #include <linux/libfdt.h>
  82 #include <spl.h>
  83 #include <asm/arch/mx6-ddr.h>
  84
  85
  86 static struct mx6ul_iomux_grp_regs mx6_grp_ioregs = {
  87         .grp_addds = 0x00000030,
  88         .grp_ddrmode_ctl = 0x00020000,
  89         .grp_b0ds = 0x00000030,
  90         .grp_ctlds = 0x00000030,
  91         .grp_b1ds = 0x00000030,
  92         .grp_ddrpke = 0x00000000,
  93         .grp_ddrmode = 0x00020000,
  94         .grp_ddr_type = 0x000c0000,
  95 };
  96
  97 static struct mx6ul_iomux_ddr_regs mx6_ddr_ioregs = {
  98         .dram_dqm0 = 0x00000030,
  99         .dram_dqm1 = 0x00000030,
 100         .dram_ras = 0x00000030,
 101         .dram_cas = 0x00000030,
 102         .dram_odt0 = 0x00000030,
 103         .dram_odt1 = 0x00000030,
 104         .dram_sdba2 = 0x00000000,
 105         .dram_sdclk_0 = 0x00000030,
 106         .dram_sdqs0 = 0x00000030,
 107         .dram_sdqs1 = 0x00000030,
 108         .dram_reset = 0x00000030,
 109 };
 110
 111 static struct mx6_mmdc_calibration mx6_mmcd_calib = {
 112         .p0_mpwldectrl0 = 0x00000000,
 113         .p0_mpdgctrl0 = 0x41570155,
 114         .p0_mprddlctl = 0x4040474A,
 115         .p0_mpwrdlctl = 0x40405550,
 116 };
 117
 118 struct mx6_ddr_sysinfo ddr_sysinfo = {
 119         .dsize = 0,
 120         .cs_density = 20,
 121         .ncs = 1,
 122         .cs1_mirror = 0,
 123         .rtt_wr = 2,
 124         .rtt_nom = 1,           /* RTT_Nom = RZQ/2 */
 125         .walat = 0,             /* Write additional latency */
 126         .ralat = 5,             /* Read additional latency */
 127         .mif3_mode = 3,         /* Command prediction working mode */
 128         .bi_on = 1,             /* Bank interleaving enabled */
 129         .sde_to_rst = 0x10,     /* 14 cycles, 200us (JEDEC default) */
 130         .rst_to_cke = 0x23,     /* 33 cycles, 500us (JEDEC default) */
 131         .ddr_type = DDR_TYPE_DDR3,
 132         .refsel = 0,            /* Refresh cycles at 64KHz */
 133         .refr = 1,              /* 2 refresh commands per refresh cycle */
 134 };
 135
 136 static struct mx6_ddr3_cfg mem_ddr = {
 137         .mem_speed = 800,
 138         .density = 4,
 139         .width = 16,
 140         .banks = 8,
 141         .rowaddr = 15,
 142         .coladdr = 10,
 143         .pagesz = 2,
 144         .trcd = 1375,
 145         .trcmin = 4875,
 146         .trasmin = 3500,
 147 };
 148
 149 static void ccgr_init(void)
 150 {
 151         struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
 152
 153         writel(0xFFFFFFFF, &ccm->CCGR0);
 154         writel(0xFFFFFFFF, &ccm->CCGR1);
 155         writel(0xFFFFFFFF, &ccm->CCGR2);
 156         writel(0xFFFFFFFF, &ccm->CCGR3);
 157         writel(0xFFFFFFFF, &ccm->CCGR4);
 158         writel(0xFFFFFFFF, &ccm->CCGR5);
 159         writel(0xFFFFFFFF, &ccm->CCGR6);
 160         writel(0xFFFFFFFF, &ccm->CCGR7);
 161 }
 162
 163 static void spl_dram_init(void)
 164 {
 165         unsigned long ram_size;
 166
 167         mx6ul_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs);
 168         mx6_dram_cfg(&ddr_sysinfo, &mx6_mmcd_calib, &mem_ddr);
 169
 170         /*
 171          * Get actual RAM size, so we can adjust DDR row size for <512M
 172          * memories
 173          */
 174         ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, SZ_512M);
 175         if (ram_size < SZ_512M) {
 176                 mem_ddr.rowaddr = 14;
 177                 mx6_dram_cfg(&ddr_sysinfo, &mx6_mmcd_calib, &mem_ddr);
 178         }
 179 }
 180
 181 void litesom_init_f(void)
 182 {
 183         ccgr_init();
 184
 185         /* setup AIPS and disable watchdog */
 186         arch_cpu_init();
 187
 188 #ifdef CONFIG_BOARD_EARLY_INIT_F
 189         board_early_init_f();
 190 #endif
 191
 192         /* setup GP timer */
 193         timer_init();
 194
 195         /* UART clocks enabled and gd valid - init serial console */
 196         preloader_console_init();
 197
 198         /* DDR initialization */
 199         spl_dram_init();
 200 }
 201 #endif