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