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