common/spl/spl_nand.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2011
   4  * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
   5  */
   6 #include <common.h>
   7 #include <config.h>
   8 #include <spl.h>
   9 #include <asm/io.h>
  10 #include <nand.h>
  11 #include <linux/libfdt_env.h>
  12 #include <fdt.h>
  13
  14 #if defined(CONFIG_SPL_NAND_RAW_ONLY)
  15 static int spl_nand_load_image(struct spl_image_info *spl_image,
  16                         struct spl_boot_device *bootdev)
  17 {
  18         nand_init();
  19
  20         printf("Loading U-Boot from 0x%08x (size 0x%08x) to 0x%08x\n",
  21                CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE,
  22                CONFIG_SYS_NAND_U_BOOT_DST);
  23
  24         nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
  25                             CONFIG_SYS_NAND_U_BOOT_SIZE,
  26                             (void *)CONFIG_SYS_NAND_U_BOOT_DST);
  27         spl_set_header_raw_uboot(spl_image);
  28         nand_deselect();
  29
  30         return 0;
  31 }
  32 #else
  33
  34 static ulong spl_nand_fit_read(struct spl_load_info *load, ulong offs,
  35                                ulong size, void *dst)
  36 {
  37         int ret;
  38
  39         ret = nand_spl_load_image(offs, size, dst);
  40         if (!ret)
  41                 return size;
  42         else
  43                 return 0;
  44 }
  45
  46 static int spl_nand_load_element(struct spl_image_info *spl_image,
  47                                  int offset, struct image_header *header)
  48 {
  49         int err;
  50
  51         err = nand_spl_load_image(offset, sizeof(*header), (void *)header);
  52         if (err)
  53                 return err;
  54
  55         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  56             image_get_magic(header) == FDT_MAGIC) {
  57                 struct spl_load_info load;
  58
  59                 debug("Found FIT\n");
  60                 load.dev = NULL;
  61                 load.priv = NULL;
  62                 load.filename = NULL;
  63                 load.bl_len = 1;
  64                 load.read = spl_nand_fit_read;
  65                 return spl_load_simple_fit(spl_image, &load, offset, header);
  66         } else {
  67                 err = spl_parse_image_header(spl_image, header);
  68                 if (err)
  69                         return err;
  70                 return nand_spl_load_image(offset, spl_image->size,
  71                                            (void *)(ulong)spl_image->load_addr);
  72         }
  73 }
  74
  75 static int spl_nand_load_image(struct spl_image_info *spl_image,
  76                                struct spl_boot_device *bootdev)
  77 {
  78         int err;
  79         struct image_header *header;
  80         int *src __attribute__((unused));
  81         int *dst __attribute__((unused));
  82
  83 #ifdef CONFIG_SPL_NAND_SOFTECC
  84         debug("spl: nand - using sw ecc\n");
  85 #else
  86         debug("spl: nand - using hw ecc\n");
  87 #endif
  88         nand_init();
  89
  90         header = spl_get_load_buffer(0, sizeof(*header));
  91
  92 #ifdef CONFIG_SPL_OS_BOOT
  93         if (!spl_start_uboot()) {
  94                 /*
  95                  * load parameter image
  96                  * load to temp position since nand_spl_load_image reads
  97                  * a whole block which is typically larger than
  98                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
  99                  * following sections like BSS
 100                  */
 101                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
 102                         CONFIG_CMD_SPL_WRITE_SIZE,
 103                         (void *)CONFIG_SYS_TEXT_BASE);
 104                 /* copy to destintion */
 105                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
 106                                 src = (int *)CONFIG_SYS_TEXT_BASE;
 107                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
 108                                 CONFIG_CMD_SPL_WRITE_SIZE);
 109                                 src++, dst++) {
 110                         writel(readl(src), dst);
 111                 }
 112
 113                 /* load linux */
 114                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
 115                         sizeof(*header), (void *)header);
 116                 err = spl_parse_image_header(spl_image, header);
 117                 if (err)
 118                         return err;
 119                 if (header->ih_os == IH_OS_LINUX) {
 120                         /* happy - was a linux */
 121                         err = nand_spl_load_image(
 122                                 CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
 123                                 spl_image->size,
 124                                 (void *)spl_image->load_addr);
 125                         nand_deselect();
 126                         return err;
 127                 } else {
 128                         puts("The Expected Linux image was not "
 129                                 "found. Please check your NAND "
 130                                 "configuration.\n");
 131                         puts("Trying to start u-boot now...\n");
 132                 }
 133         }
 134 #endif
 135 #ifdef CONFIG_NAND_ENV_DST
 136         spl_nand_load_element(spl_image, CONFIG_ENV_OFFSET, header);
 137 #ifdef CONFIG_ENV_OFFSET_REDUND
 138         spl_nand_load_element(spl_image, CONFIG_ENV_OFFSET_REDUND, header);
 139 #endif
 140 #endif
 141         /* Load u-boot */
 142         err = spl_nand_load_element(spl_image, CONFIG_SYS_NAND_U_BOOT_OFFS,
 143                                     header);
 144 #ifdef CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND
 145 #if CONFIG_SYS_NAND_U_BOOT_OFFS != CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND
 146         if (err)
 147                 err = spl_nand_load_element(spl_image,
 148                                             CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND,
 149                                             header);
 150 #endif
 151 #endif
 152         nand_deselect();
 153         return err;
 154 }
 155 #endif
 156 /* Use priorty 1 so that Ubi can override this */
 157 SPL_LOAD_IMAGE_METHOD("NAND", 1, BOOT_DEVICE_NAND, spl_nand_load_image);