common/spl/spl_nand.c

   1 /*
   2  * Copyright (C) 2011
   3  * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 #include <common.h>
   8 #include <config.h>
   9 #include <spl.h>
  10 #include <asm/io.h>
  11 #include <nand.h>
  12 #include <libfdt_env.h>
  13 #include <fdt.h>
  14
  15 #if defined(CONFIG_SPL_NAND_RAW_ONLY)
  16 int spl_nand_load_image(struct spl_boot_device *bootdev)
  17 {
  18         nand_init();
  19
  20         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  21                             CONFIG_SYS_NAND_U_BOOT_SIZE,
  22                             (void *)CONFIG_SYS_NAND_U_BOOT_DST);
  23         spl_set_header_raw_uboot(&spl_image);
  24         nand_deselect();
  25
  26         return 0;
  27 }
  28 #else
  29
  30 static ulong spl_nand_fit_read(struct spl_load_info *load, ulong offs,
  31                                ulong size, void *dst)
  32 {
  33         int ret;
  34
  35         ret = nand_spl_load_image(offs, size, dst);
  36         if (!ret)
  37                 return size;
  38         else
  39                 return 0;
  40 }
  41
  42 static int spl_nand_load_element(int offset, struct image_header *header)
  43 {
  44         int err;
  45
  46         err = nand_spl_load_image(offset, sizeof(*header), (void *)header);
  47         if (err)
  48                 return err;
  49
  50         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  51             image_get_magic(header) == FDT_MAGIC) {
  52                 struct spl_load_info load;
  53
  54                 debug("Found FIT\n");
  55                 load.dev = NULL;
  56                 load.priv = NULL;
  57                 load.filename = NULL;
  58                 load.bl_len = 1;
  59                 load.read = spl_nand_fit_read;
  60                 return spl_load_simple_fit(&load, offset, header);
  61         } else {
  62                 err = spl_parse_image_header(&spl_image, header);
  63                 if (err)
  64                         return err;
  65                 return nand_spl_load_image(offset, spl_image.size,
  66                                            (void *)(ulong)spl_image.load_addr);
  67         }
  68 }
  69
  70 static int spl_nand_load_image(struct spl_boot_device *bootdev)
  71 {
  72         int err;
  73         struct image_header *header;
  74         int *src __attribute__((unused));
  75         int *dst __attribute__((unused));
  76
  77 #ifdef CONFIG_SPL_NAND_SOFTECC
  78         debug("spl: nand - using sw ecc\n");
  79 #else
  80         debug("spl: nand - using hw ecc\n");
  81 #endif
  82         nand_init();
  83
  84         /*use CONFIG_SYS_TEXT_BASE as temporary storage area */
  85         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
  86 #ifdef CONFIG_SPL_OS_BOOT
  87         if (!spl_start_uboot()) {
  88                 /*
  89                  * load parameter image
  90                  * load to temp position since nand_spl_load_image reads
  91                  * a whole block which is typically larger than
  92                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
  93                  * following sections like BSS
  94                  */
  95                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
  96                         CONFIG_CMD_SPL_WRITE_SIZE,
  97                         (void *)CONFIG_SYS_TEXT_BASE);
  98                 /* copy to destintion */
  99                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
 100                                 src = (int *)CONFIG_SYS_TEXT_BASE;
 101                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
 102                                 CONFIG_CMD_SPL_WRITE_SIZE);
 103                                 src++, dst++) {
 104                         writel(readl(src), dst);
 105                 }
 106
 107                 /* load linux */
 108                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
 109                         sizeof(*header), (void *)header);
 110                 err = spl_parse_image_header(&spl_image, header);
 111                 if (err)
 112                         return err;
 113                 if (header->ih_os == IH_OS_LINUX) {
 114                         /* happy - was a linux */
 115                         err = nand_spl_load_image(
 116                                 CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
 117                                 spl_image.size,
 118                                 (void *)spl_image.load_addr);
 119                         nand_deselect();
 120                         return err;
 121                 } else {
 122                         puts("The Expected Linux image was not "
 123                                 "found. Please check your NAND "
 124                                 "configuration.\n");
 125                         puts("Trying to start u-boot now...\n");
 126                 }
 127         }
 128 #endif
 129 #ifdef CONFIG_NAND_ENV_DST
 130         spl_nand_load_element(CONFIG_ENV_OFFSET, header);
 131 #ifdef CONFIG_ENV_OFFSET_REDUND
 132         spl_nand_load_element(CONFIG_ENV_OFFSET_REDUND, header);
 133 #endif
 134 #endif
 135         /* Load u-boot */
 136         err = spl_nand_load_element(CONFIG_SYS_NAND_U_BOOT_OFFS, header);
 137 #ifdef CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND
 138 #if CONFIG_SYS_NAND_U_BOOT_OFFS != CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND
 139         if (err)
 140                 err = spl_nand_load_element(CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND,
 141                                             header);
 142 #endif
 143 #endif
 144         nand_deselect();
 145         return err;
 146 }
 147 #endif
 148 /* Use priorty 1 so that Ubi can override this */
 149 SPL_LOAD_IMAGE_METHOD(1, BOOT_DEVICE_NAND, spl_nand_load_image);