git.sur5r.net Git - u-boot/blob - common/fb_mmc.c

   1 /*
   2  * Copyright 2014 Broadcom Corporation.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <config.h>
   8 #include <common.h>
   9 #include <fastboot.h>
  10 #include <fb_mmc.h>
  11 #include <part.h>
  12 #include <aboot.h>
  13 #include <sparse_format.h>
  14 #include <mmc.h>
  15
  16 #ifndef CONFIG_FASTBOOT_GPT_NAME
  17 #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
  18 #endif
  19
  20 static char *response_str;
  21
  22 static int get_partition_info_efi_by_name_or_alias(block_dev_desc_t *dev_desc,
  23                 const char *name, disk_partition_t *info)
  24 {
  25         int ret;
  26
  27         ret = get_partition_info_efi_by_name(dev_desc, name, info);
  28         if (ret) {
  29                 /* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
  30                 char env_alias_name[25 + 32 + 1];
  31                 char *aliased_part_name;
  32
  33                 /* check for alias */
  34                 strcpy(env_alias_name, "fastboot_partition_alias_");
  35                 strncat(env_alias_name, name, 32);
  36                 aliased_part_name = getenv(env_alias_name);
  37                 if (aliased_part_name != NULL)
  38                         ret = get_partition_info_efi_by_name(dev_desc,
  39                                         aliased_part_name, info);
  40         }
  41         return ret;
  42 }
  43
  44 static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info,
  45                 const char *part_name, void *buffer,
  46                 unsigned int download_bytes)
  47 {
  48         lbaint_t blkcnt;
  49         lbaint_t blks;
  50
  51         /* determine number of blocks to write */
  52         blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
  53         blkcnt = blkcnt / info->blksz;
  54
  55         if (blkcnt > info->size) {
  56                 error("too large for partition: '%s'\n", part_name);
  57                 fastboot_fail(response_str, "too large for partition");
  58                 return;
  59         }
  60
  61         puts("Flashing Raw Image\n");
  62
  63         blks = dev_desc->block_write(dev_desc->dev, info->start, blkcnt,
  64                                      buffer);
  65         if (blks != blkcnt) {
  66                 error("failed writing to device %d\n", dev_desc->dev);
  67                 fastboot_fail(response_str, "failed writing to device");
  68                 return;
  69         }
  70
  71         printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
  72                part_name);
  73         fastboot_okay(response_str, "");
  74 }
  75
  76 void fb_mmc_flash_write(const char *cmd, void *download_buffer,
  77                         unsigned int download_bytes, char *response)
  78 {
  79         block_dev_desc_t *dev_desc;
  80         disk_partition_t info;
  81
  82         /* initialize the response buffer */
  83         response_str = response;
  84
  85         dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
  86         if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
  87                 error("invalid mmc device\n");
  88                 fastboot_fail(response_str, "invalid mmc device");
  89                 return;
  90         }
  91
  92         if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
  93                 printf("%s: updating MBR, Primary and Backup GPT(s)\n",
  94                        __func__);
  95                 if (is_valid_gpt_buf(dev_desc, download_buffer)) {
  96                         printf("%s: invalid GPT - refusing to write to flash\n",
  97                                __func__);
  98                         fastboot_fail(response_str, "invalid GPT partition");
  99                         return;
 100                 }
 101                 if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
 102                         printf("%s: writing GPT partitions failed\n", __func__);
 103                         fastboot_fail(response_str,
 104                                       "writing GPT partitions failed");
 105                         return;
 106                 }
 107                 printf("........ success\n");
 108                 fastboot_okay(response_str, "");
 109                 return;
 110         } else if (get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info)) {
 111                 error("cannot find partition: '%s'\n", cmd);
 112                 fastboot_fail(response_str, "cannot find partition");
 113                 return;
 114         }
 115
 116         if (is_sparse_image(download_buffer))
 117                 write_sparse_image(dev_desc, &info, cmd, download_buffer,
 118                                    download_bytes);
 119         else
 120                 write_raw_image(dev_desc, &info, cmd, download_buffer,
 121                                 download_bytes);
 122
 123         fastboot_okay(response_str, "");
 124 }
 125
 126 void fb_mmc_erase(const char *cmd, char *response)
 127 {
 128         int ret;
 129         block_dev_desc_t *dev_desc;
 130         disk_partition_t info;
 131         lbaint_t blks, blks_start, blks_size, grp_size;
 132         struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
 133
 134         if (mmc == NULL) {
 135                 error("invalid mmc device");
 136                 fastboot_fail(response_str, "invalid mmc device");
 137                 return;
 138         }
 139
 140         /* initialize the response buffer */
 141         response_str = response;
 142
 143         dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
 144         if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
 145                 error("invalid mmc device");
 146                 fastboot_fail(response_str, "invalid mmc device");
 147                 return;
 148         }
 149
 150         ret = get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info);
 151         if (ret) {
 152                 error("cannot find partition: '%s'", cmd);
 153                 fastboot_fail(response_str, "cannot find partition");
 154                 return;
 155         }
 156
 157         /* Align blocks to erase group size to avoid erasing other partitions */
 158         grp_size = mmc->erase_grp_size;
 159         blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
 160         if (info.size >= grp_size)
 161                 blks_size = (info.size - (blks_start - info.start)) &
 162                                 (~(grp_size - 1));
 163         else
 164                 blks_size = 0;
 165
 166         printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
 167                blks_start, blks_start + blks_size);
 168
 169         blks = dev_desc->block_erase(dev_desc->dev, blks_start, blks_size);
 170         if (blks != blks_size) {
 171                 error("failed erasing from device %d", dev_desc->dev);
 172                 fastboot_fail(response_str, "failed erasing from device");
 173                 return;
 174         }
 175
 176         printf("........ erased " LBAFU " bytes from '%s'\n",
 177                blks_size * info.blksz, cmd);
 178         fastboot_okay(response_str, "");
 179 }