arch/arm/mach-imx/spl.c

   1 /*
   2  * Copyright (C) 2014 Gateworks Corporation
   3  * Copyright (C) 2011-2012 Freescale Semiconductor, Inc.
   4  *
   5  * Author: Tim Harvey <tharvey@gateworks.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <asm/io.h>
  12 #include <asm/arch/imx-regs.h>
  13 #include <asm/arch/sys_proto.h>
  14 #include <asm/spl.h>
  15 #include <spl.h>
  16 #include <asm/mach-imx/hab.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 #if defined(CONFIG_MX6)
  21 /* determine boot device from SRC_SBMR1 (BOOT_CFG[4:1]) or SRC_GPR9 register */
  22 u32 spl_boot_device(void)
  23 {
  24         unsigned int bmode = readl(&src_base->sbmr2);
  25         u32 reg = imx6_src_get_boot_mode();
  26
  27         /*
  28          * Check for BMODE if serial downloader is enabled
  29          * BOOT_MODE - see IMX6DQRM Table 8-1
  30          */
  31         if (((bmode >> 24) & 0x03) == 0x01) /* Serial Downloader */
  32                 return BOOT_DEVICE_BOARD;
  33
  34         /*
  35          * The above method does not detect that the boot ROM used
  36          * serial downloader in case the boot ROM decided to use the
  37          * serial downloader as a fall back (primary boot source failed).
  38          *
  39          * Infer that the boot ROM used the USB serial downloader by
  40          * checking whether the USB PHY is currently active... This
  41          * assumes that SPL did not (yet) initialize the USB PHY...
  42          */
  43         if (is_usbotg_phy_active())
  44                 return BOOT_DEVICE_BOARD;
  45
  46         /* BOOT_CFG1[7:4] - see IMX6DQRM Table 8-8 */
  47         switch ((reg & IMX6_BMODE_MASK) >> IMX6_BMODE_SHIFT) {
  48          /* EIM: See 8.5.1, Table 8-9 */
  49         case IMX6_BMODE_EMI:
  50                 /* BOOT_CFG1[3]: NOR/OneNAND Selection */
  51                 switch ((reg & IMX6_BMODE_EMI_MASK) >> IMX6_BMODE_EMI_SHIFT) {
  52                 case IMX6_BMODE_ONENAND:
  53                         return BOOT_DEVICE_ONENAND;
  54                 case IMX6_BMODE_NOR:
  55                         return BOOT_DEVICE_NOR;
  56                 break;
  57                 }
  58         /* Reserved: Used to force Serial Downloader */
  59         case IMX6_BMODE_RESERVED:
  60                 return BOOT_DEVICE_BOARD;
  61         /* SATA: See 8.5.4, Table 8-20 */
  62 #if !defined(CONFIG_MX6UL) && !defined(CONFIG_MX6ULL)
  63         case IMX6_BMODE_SATA:
  64                 return BOOT_DEVICE_SATA;
  65 #endif
  66         /* Serial ROM: See 8.5.5.1, Table 8-22 */
  67         case IMX6_BMODE_SERIAL_ROM:
  68                 /* BOOT_CFG4[2:0] */
  69                 switch ((reg & IMX6_BMODE_SERIAL_ROM_MASK) >>
  70                         IMX6_BMODE_SERIAL_ROM_SHIFT) {
  71                 case IMX6_BMODE_ECSPI1:
  72                 case IMX6_BMODE_ECSPI2:
  73                 case IMX6_BMODE_ECSPI3:
  74                 case IMX6_BMODE_ECSPI4:
  75                 case IMX6_BMODE_ECSPI5:
  76                         return BOOT_DEVICE_SPI;
  77                 case IMX6_BMODE_I2C1:
  78                 case IMX6_BMODE_I2C2:
  79                 case IMX6_BMODE_I2C3:
  80                         return BOOT_DEVICE_I2C;
  81                 }
  82                 break;
  83         /* SD/eSD: 8.5.3, Table 8-15  */
  84         case IMX6_BMODE_SD:
  85         case IMX6_BMODE_ESD:
  86                 return BOOT_DEVICE_MMC1;
  87         /* MMC/eMMC: 8.5.3 */
  88         case IMX6_BMODE_MMC:
  89         case IMX6_BMODE_EMMC:
  90                 return BOOT_DEVICE_MMC1;
  91         /* NAND Flash: 8.5.2, Table 8-10 */
  92         case IMX6_BMODE_NAND:
  93                 return BOOT_DEVICE_NAND;
  94         }
  95         return BOOT_DEVICE_NONE;
  96 }
  97 #endif
  98
  99 #if defined(CONFIG_SPL_MMC_SUPPORT)
 100 /* called from spl_mmc to see type of boot mode for storage (RAW or FAT) */
 101 u32 spl_boot_mode(const u32 boot_device)
 102 {
 103         switch (spl_boot_device()) {
 104         /* for MMC return either RAW or FAT mode */
 105         case BOOT_DEVICE_MMC1:
 106         case BOOT_DEVICE_MMC2:
 107 #if defined(CONFIG_SPL_FAT_SUPPORT)
 108                 return MMCSD_MODE_FS;
 109 #elif defined(CONFIG_SUPPORT_EMMC_BOOT)
 110                 return MMCSD_MODE_EMMCBOOT;
 111 #else
 112                 return MMCSD_MODE_RAW;
 113 #endif
 114                 break;
 115         default:
 116                 puts("spl: ERROR:  unsupported device\n");
 117                 hang();
 118         }
 119 }
 120 #endif
 121
 122 #if defined(CONFIG_SECURE_BOOT)
 123
 124 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 125 {
 126         typedef void __noreturn (*image_entry_noargs_t)(void);
 127
 128         image_entry_noargs_t image_entry =
 129                 (image_entry_noargs_t)(unsigned long)spl_image->entry_point;
 130
 131         debug("image entry point: 0x%lX\n", spl_image->entry_point);
 132
 133         /* HAB looks for the CSF at the end of the authenticated data therefore,
 134          * we need to subtract the size of the CSF from the actual filesize */
 135         if (authenticate_image(spl_image->load_addr,
 136                                spl_image->size - CONFIG_CSF_SIZE)) {
 137                 image_entry();
 138         } else {
 139                 puts("spl: ERROR:  image authentication unsuccessful\n");
 140                 hang();
 141         }
 142 }
 143
 144 #endif
 145
 146 #if defined(CONFIG_MX6) && defined(CONFIG_SPL_OS_BOOT)
 147 int dram_init_banksize(void)
 148 {
 149         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 150         gd->bd->bi_dram[0].size = imx_ddr_size();
 151
 152         return 0;
 153 }
 154 #endif