arch/arm/cpu/armv8/zynqmp/spl.c

   1 /*
   2  * Copyright 2015 - 2016 Xilinx, Inc.
   3  *
   4  * Michal Simek <michal.simek@xilinx.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <debug_uart.h>
  11 #include <spl.h>
  12
  13 #include <asm/io.h>
  14 #include <asm/spl.h>
  15 #include <asm/arch/hardware.h>
  16 #include <asm/arch/sys_proto.h>
  17
  18 void board_init_f(ulong dummy)
  19 {
  20         psu_init();
  21         board_early_init_r();
  22
  23 #ifdef CONFIG_DEBUG_UART
  24         /* Uart debug for sure */
  25         debug_uart_init();
  26         puts("Debug uart enabled\n"); /* or printch() */
  27 #endif
  28         /* Delay is required for clocks to be propagated */
  29         udelay(1000000);
  30
  31         /* Clear the BSS */
  32         memset(__bss_start, 0, __bss_end - __bss_start);
  33
  34         /* No need to call timer init - it is empty for ZynqMP */
  35         board_init_r(NULL, 0);
  36 }
  37
  38 static void ps_mode_reset(ulong mode)
  39 {
  40         writel(mode << ZYNQMP_CRL_APB_BOOT_PIN_CTRL_OUT_EN_SHIFT,
  41                &crlapb_base->boot_pin_ctrl);
  42         udelay(5);
  43         writel(mode << ZYNQMP_CRL_APB_BOOT_PIN_CTRL_OUT_VAL_SHIFT |
  44                mode << ZYNQMP_CRL_APB_BOOT_PIN_CTRL_OUT_EN_SHIFT,
  45                &crlapb_base->boot_pin_ctrl);
  46 }
  47
  48 /*
  49  * Set default PS_MODE1 which is used for USB ULPI phy reset
  50  * Also other resets can be connected to this certain pin
  51  */
  52 #ifndef MODE_RESET
  53 # define MODE_RESET     PS_MODE1
  54 #endif
  55
  56 #ifdef CONFIG_SPL_BOARD_INIT
  57 void spl_board_init(void)
  58 {
  59         preloader_console_init();
  60         ps_mode_reset(MODE_RESET);
  61         board_init();
  62 }
  63 #endif
  64
  65 u32 spl_boot_device(void)
  66 {
  67         u32 reg = 0;
  68         u8 bootmode;
  69
  70 #if defined(CONFIG_SPL_ZYNQMP_ALT_BOOTMODE_ENABLED)
  71         /* Change default boot mode at run-time */
  72         writel(BOOT_MODE_USE_ALT |
  73                CONFIG_SPL_ZYNQMP_ALT_BOOTMODE << BOOT_MODE_ALT_SHIFT,
  74                &crlapb_base->boot_mode);
  75 #endif
  76
  77         reg = readl(&crlapb_base->boot_mode);
  78         bootmode = reg & BOOT_MODES_MASK;
  79
  80         switch (bootmode) {
  81         case JTAG_MODE:
  82                 return BOOT_DEVICE_RAM;
  83 #ifdef CONFIG_SPL_MMC_SUPPORT
  84         case EMMC_MODE:
  85         case SD_MODE:
  86         case SD_MODE1:
  87                 return BOOT_DEVICE_MMC1;
  88 #endif
  89 #ifdef CONFIG_SPL_DFU_SUPPORT
  90         case USB_MODE:
  91                 return BOOT_DEVICE_DFU;
  92 #endif
  93         default:
  94                 printf("Invalid Boot Mode:0x%x\n", bootmode);
  95                 break;
  96         }
  97
  98         return 0;
  99 }
 100
 101 u32 spl_boot_mode(const u32 boot_device)
 102 {
 103         switch (spl_boot_device()) {
 104         case BOOT_DEVICE_RAM:
 105                 return 0;
 106         case BOOT_DEVICE_MMC1:
 107                 return MMCSD_MODE_FS;
 108         default:
 109                 puts("spl: error: unsupported device\n");
 110                 hang();
 111         }
 112 }
 113
 114 __weak void psu_init(void)
 115 {
 116          /*
 117           * This function is overridden by the one in
 118           * board/xilinx/zynqmp/(platform)/psu_init_gpl.c, if it exists.
 119           */
 120 }
 121
 122 #ifdef CONFIG_SPL_OS_BOOT
 123 int spl_start_uboot(void)
 124 {
 125         return 0;
 126 }
 127 #endif
 128
 129 #ifdef CONFIG_SPL_LOAD_FIT
 130 int board_fit_config_name_match(const char *name)
 131 {
 132         /* Just empty function now - can't decide what to choose */
 133         debug("%s: %s\n", __func__, name);
 134
 135         return 0;
 136 }
 137 #endif