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