common/fb_nand.c

   1 /*
   2  * Copyright 2014 Broadcom Corporation.
   3  * Copyright 2015 Free Electrons.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <config.h>
   9 #include <common.h>
  10
  11 #include <fastboot.h>
  12 #include <image-sparse.h>
  13 #include <sparse_format.h>
  14
  15 #include <linux/mtd/mtd.h>
  16 #include <jffs2/jffs2.h>
  17 #include <nand.h>
  18
  19 static char *response_str;
  20
  21 struct fb_nand_sparse {
  22         struct mtd_info         *nand;
  23         struct part_info        *part;
  24 };
  25
  26 __weak int board_fastboot_erase_partition_setup(char *name)
  27 {
  28         return 0;
  29 }
  30
  31 __weak int board_fastboot_write_partition_setup(char *name)
  32 {
  33         return 0;
  34 }
  35
  36 static int fb_nand_lookup(const char *partname, char *response,
  37                           struct mtd_info **nand,
  38                           struct part_info **part)
  39 {
  40         struct mtd_device *dev;
  41         int ret;
  42         u8 pnum;
  43
  44         ret = mtdparts_init();
  45         if (ret) {
  46                 error("Cannot initialize MTD partitions\n");
  47                 fastboot_fail(response_str, "cannot init mtdparts");
  48                 return ret;
  49         }
  50
  51         ret = find_dev_and_part(partname, &dev, &pnum, part);
  52         if (ret) {
  53                 error("cannot find partition: '%s'", partname);
  54                 fastboot_fail(response_str, "cannot find partition");
  55                 return ret;
  56         }
  57
  58         if (dev->id->type != MTD_DEV_TYPE_NAND) {
  59                 error("partition '%s' is not stored on a NAND device",
  60                       partname);
  61                 fastboot_fail(response_str, "not a NAND device");
  62                 return -EINVAL;
  63         }
  64
  65         *mtd = nand_info[dev->id->num];
  66
  67         return 0;
  68 }
  69
  70 static int _fb_nand_erase(struct mtd_info *mtd, struct part_info *part)
  71 {
  72         nand_erase_options_t opts;
  73         int ret;
  74
  75         memset(&opts, 0, sizeof(opts));
  76         opts.offset = part->offset;
  77         opts.length = part->size;
  78         opts.quiet = 1;
  79
  80         printf("Erasing blocks 0x%llx to 0x%llx\n",
  81                part->offset, part->offset + part->size);
  82
  83         ret = nand_erase_opts(mtd, &opts);
  84         if (ret)
  85                 return ret;
  86
  87         printf("........ erased 0x%llx bytes from '%s'\n",
  88                part->size, part->name);
  89
  90         return 0;
  91 }
  92
  93 static int _fb_nand_write(struct mtd_info *mtd, struct part_info *part,
  94                           void *buffer, unsigned int offset,
  95                           unsigned int length, size_t *written)
  96 {
  97         int flags = WITH_WR_VERIFY;
  98
  99 #ifdef CONFIG_FASTBOOT_FLASH_NAND_TRIMFFS
 100         flags |= WITH_DROP_FFS;
 101 #endif
 102
 103         return nand_write_skip_bad(mtd, offset, &length, written,
 104                                    part->size - (offset - part->offset),
 105                                    buffer, flags);
 106 }
 107
 108 static int fb_nand_sparse_write(struct sparse_storage *storage,
 109                                 void *priv,
 110                                 unsigned int offset,
 111                                 unsigned int size,
 112                                 char *data)
 113 {
 114         struct fb_nand_sparse *sparse = priv;
 115         size_t written;
 116         int ret;
 117
 118         ret = _fb_nand_write(sparse->nand, sparse->part, data,
 119                              offset * storage->block_sz,
 120                              size * storage->block_sz, &written);
 121         if (ret < 0) {
 122                 printf("Failed to write sparse chunk\n");
 123                 return ret;
 124         }
 125
 126         return written / storage->block_sz;
 127 }
 128
 129 void fb_nand_flash_write(const char *partname, unsigned int session_id,
 130                          void *download_buffer, unsigned int download_bytes,
 131                          char *response)
 132 {
 133         struct part_info *part;
 134         struct mtd_info *mtd = NULL;
 135         int ret;
 136
 137         /* initialize the response buffer */
 138         response_str = response;
 139
 140         ret = fb_nand_lookup(partname, response, &mtd, &part);
 141         if (ret) {
 142                 error("invalid NAND device");
 143                 fastboot_fail(response_str, "invalid NAND device");
 144                 return;
 145         }
 146
 147         ret = board_fastboot_write_partition_setup(part->name);
 148         if (ret)
 149                 return;
 150
 151         if (is_sparse_image(download_buffer)) {
 152                 struct fb_nand_sparse sparse_priv;
 153                 sparse_storage_t sparse;
 154
 155                 sparse_priv.nand = mtd;
 156                 sparse_priv.part = part;
 157
 158                 sparse.block_sz = mtd->writesize;
 159                 sparse.start = part->offset / sparse.block_sz;
 160                 sparse.size = part->size  / sparse.block_sz;
 161                 sparse.name = part->name;
 162                 sparse.write = fb_nand_sparse_write;
 163
 164                 ret = store_sparse_image(&sparse, &sparse_priv, session_id,
 165                                          download_buffer);
 166         } else {
 167                 printf("Flashing raw image at offset 0x%llx\n",
 168                        part->offset);
 169
 170                 ret = _fb_nand_write(mtd, part, download_buffer, part->offset,
 171                                      download_bytes, NULL);
 172
 173                 printf("........ wrote %u bytes to '%s'\n",
 174                        download_bytes, part->name);
 175         }
 176
 177         if (ret) {
 178                 fastboot_fail(response_str, "error writing the image");
 179                 return;
 180         }
 181
 182         fastboot_okay(response_str, "");
 183 }
 184
 185 void fb_nand_erase(const char *partname, char *response)
 186 {
 187         struct part_info *part;
 188         struct mtd_info *mtd = NULL;
 189         int ret;
 190
 191         /* initialize the response buffer */
 192         response_str = response;
 193
 194         ret = fb_nand_lookup(partname, response, &mtd, &part);
 195         if (ret) {
 196                 error("invalid NAND device");
 197                 fastboot_fail(response_str, "invalid NAND device");
 198                 return;
 199         }
 200
 201         ret = board_fastboot_erase_partition_setup(part->name);
 202         if (ret)
 203                 return;
 204
 205         ret = _fb_nand_erase(mtd, part);
 206         if (ret) {
 207                 error("failed erasing from device %s", mtd->name);
 208                 fastboot_fail(response_str, "failed erasing from device");
 209                 return;
 210         }
 211
 212         fastboot_okay(response_str, "");
 213 }