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 <fdt_support.h>
   9 #include <image.h>
  10 #include <log.h>
  11 #include <spl.h>
  12 #include <asm/io.h>
  13 #include <nand.h>
  14 #include <linux/libfdt_env.h>
  15 #include <fdt.h>
  16
  17 uint32_t __weak spl_nand_get_uboot_raw_page(void)
  18 {
  19         return CONFIG_SYS_NAND_U_BOOT_OFFS;
  20 }
  21
  22 #if defined(CONFIG_SPL_NAND_RAW_ONLY)
  23 static int spl_nand_load_image(struct spl_image_info *spl_image,
  24                         struct spl_boot_device *bootdev)
  25 {
  26         nand_init();
  27
  28         printf("Loading U-Boot from 0x%08x (size 0x%08x) to 0x%08x\n",
  29                CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE,
  30                CONFIG_SYS_NAND_U_BOOT_DST);
  31
  32         nand_spl_load_image(spl_nand_get_uboot_raw_page(),
  33                             CONFIG_SYS_NAND_U_BOOT_SIZE,
  34                             (void *)CONFIG_SYS_NAND_U_BOOT_DST);
  35         spl_set_header_raw_uboot(spl_image);
  36         nand_deselect();
  37
  38         return 0;
  39 }
  40 #else
  41
  42 static ulong spl_nand_fit_read(struct spl_load_info *load, ulong offs,
  43                                ulong size, void *dst)
  44 {
  45         int err;
  46 #ifdef CONFIG_SYS_NAND_BLOCK_SIZE
  47         ulong sector;
  48
  49         sector = *(int *)load->priv;
  50         offs = sector + nand_spl_adjust_offset(sector, offs - sector);
  51 #else
  52         offs *= load->bl_len;
  53         size *= load->bl_len;
  54 #endif
  55         err = nand_spl_load_image(offs, size, dst);
  56         if (err)
  57                 return 0;
  58
  59         return size / load->bl_len;
  60 }
  61
  62 struct mtd_info * __weak nand_get_mtd(void)
  63 {
  64         return NULL;
  65 }
  66
  67 static int spl_nand_load_element(struct spl_image_info *spl_image,
  68                                  struct spl_boot_device *bootdev,
  69                                  int offset, struct image_header *header)
  70 {
  71         struct mtd_info *mtd = nand_get_mtd();
  72         int bl_len = mtd ? mtd->writesize : 1;
  73         int err;
  74
  75         err = nand_spl_load_image(offset, sizeof(*header), (void *)header);
  76         if (err)
  77                 return err;
  78
  79         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
  80             image_get_magic(header) == FDT_MAGIC) {
  81                 struct spl_load_info load;
  82
  83                 debug("Found FIT\n");
  84                 load.dev = NULL;
  85                 load.priv = &offset;
  86                 load.filename = NULL;
  87                 load.bl_len = bl_len;
  88                 load.read = spl_nand_fit_read;
  89                 return spl_load_simple_fit(spl_image, &load, offset / bl_len, header);
  90         } else if (IS_ENABLED(CONFIG_SPL_LOAD_IMX_CONTAINER)) {
  91                 struct spl_load_info load;
  92
  93                 load.dev = NULL;
  94                 load.priv = NULL;
  95                 load.filename = NULL;
  96                 load.bl_len = bl_len;
  97                 load.read = spl_nand_fit_read;
  98                 return spl_load_imx_container(spl_image, &load, offset / bl_len);
  99         } else {
 100                 err = spl_parse_image_header(spl_image, bootdev, header);
 101                 if (err)
 102                         return err;
 103                 return nand_spl_load_image(offset, spl_image->size,
 104                                            (void *)(ulong)spl_image->load_addr);
 105         }
 106 }
 107
 108 static int spl_nand_load_image(struct spl_image_info *spl_image,
 109                                struct spl_boot_device *bootdev)
 110 {
 111         int err;
 112         struct image_header *header;
 113         int *src __attribute__((unused));
 114         int *dst __attribute__((unused));
 115
 116 #ifdef CONFIG_SPL_NAND_SOFTECC
 117         debug("spl: nand - using sw ecc\n");
 118 #else
 119         debug("spl: nand - using hw ecc\n");
 120 #endif
 121         nand_init();
 122
 123         header = spl_get_load_buffer(0, sizeof(*header));
 124
 125 #if CONFIG_IS_ENABLED(OS_BOOT)
 126         if (!spl_start_uboot()) {
 127                 /*
 128                  * load parameter image
 129                  * load to temp position since nand_spl_load_image reads
 130                  * a whole block which is typically larger than
 131                  * CONFIG_CMD_SPL_WRITE_SIZE therefore may overwrite
 132                  * following sections like BSS
 133                  */
 134                 nand_spl_load_image(CONFIG_CMD_SPL_NAND_OFS,
 135                         CONFIG_CMD_SPL_WRITE_SIZE,
 136                         (void *)CONFIG_SYS_TEXT_BASE);
 137                 /* copy to destintion */
 138                 for (dst = (int *)CONFIG_SYS_SPL_ARGS_ADDR,
 139                                 src = (int *)CONFIG_SYS_TEXT_BASE;
 140                                 src < (int *)(CONFIG_SYS_TEXT_BASE +
 141                                 CONFIG_CMD_SPL_WRITE_SIZE);
 142                                 src++, dst++) {
 143                         writel(readl(src), dst);
 144                 }
 145
 146                 /* load linux */
 147                 nand_spl_load_image(CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
 148                         sizeof(*header), (void *)header);
 149                 err = spl_parse_image_header(spl_image, bootdev, header);
 150                 if (err)
 151                         return err;
 152                 if (header->ih_os == IH_OS_LINUX) {
 153                         /* happy - was a linux */
 154                         err = nand_spl_load_image(
 155                                 CONFIG_SYS_NAND_SPL_KERNEL_OFFS,
 156                                 spl_image->size,
 157                                 (void *)spl_image->load_addr);
 158                         nand_deselect();
 159                         return err;
 160                 } else {
 161                         puts("The Expected Linux image was not "
 162                                 "found. Please check your NAND "
 163                                 "configuration.\n");
 164                         puts("Trying to start u-boot now...\n");
 165                 }
 166         }
 167 #endif
 168 #ifdef CONFIG_NAND_ENV_DST
 169         spl_nand_load_element(spl_image, bootdev, CONFIG_ENV_OFFSET, header);
 170 #ifdef CONFIG_ENV_OFFSET_REDUND
 171         spl_nand_load_element(spl_image, bootdev, CONFIG_ENV_OFFSET_REDUND, header);
 172 #endif
 173 #endif
 174         /* Load u-boot */
 175         err = spl_nand_load_element(spl_image, bootdev, spl_nand_get_uboot_raw_page(),
 176                                     header);
 177 #ifdef CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND
 178 #if CONFIG_SYS_NAND_U_BOOT_OFFS != CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND
 179         if (err)
 180                 err = spl_nand_load_element(spl_image, bootdev,
 181                                             CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND,
 182                                             header);
 183 #endif
 184 #endif
 185         nand_deselect();
 186         return err;
 187 }
 188 #endif
 189 /* Use priorty 1 so that Ubi can override this */
 190 SPL_LOAD_IMAGE_METHOD("NAND", 1, BOOT_DEVICE_NAND, spl_nand_load_image);