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