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
  14 #ifndef CONFIG_FASTBOOT_GPT_NAME
  15 #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
  16 #endif
  17
  18 /* The 64 defined bytes plus the '\0' */
  19 #define RESPONSE_LEN    (64 + 1)
  20
  21 static char *response_str;
  22
  23 void fastboot_fail(const char *s)
  24 {
  25         strncpy(response_str, "FAIL", 4);
  26         strncat(response_str, s, RESPONSE_LEN - 4 - 1);
  27 }
  28
  29 void fastboot_okay(const char *s)
  30 {
  31         strncpy(response_str, "OKAY", 4);
  32         strncat(response_str, s, RESPONSE_LEN - 4 - 1);
  33 }
  34
  35 static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info,
  36                 const char *part_name, void *buffer,
  37                 unsigned int download_bytes)
  38 {
  39         lbaint_t blkcnt;
  40         lbaint_t blks;
  41
  42         /* determine number of blocks to write */
  43         blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
  44         blkcnt = blkcnt / info->blksz;
  45
  46         if (blkcnt > info->size) {
  47                 error("too large for partition: '%s'\n", part_name);
  48                 fastboot_fail("too large for partition");
  49                 return;
  50         }
  51
  52         puts("Flashing Raw Image\n");
  53
  54         blks = dev_desc->block_write(dev_desc->dev, info->start, blkcnt,
  55                                      buffer);
  56         if (blks != blkcnt) {
  57                 error("failed writing to device %d\n", dev_desc->dev);
  58                 fastboot_fail("failed writing to device");
  59                 return;
  60         }
  61
  62         printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
  63                part_name);
  64         fastboot_okay("");
  65 }
  66
  67 void fb_mmc_flash_write(const char *cmd, void *download_buffer,
  68                         unsigned int download_bytes, char *response)
  69 {
  70         block_dev_desc_t *dev_desc;
  71         disk_partition_t info;
  72
  73         /* initialize the response buffer */
  74         response_str = response;
  75
  76         dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
  77         if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
  78                 error("invalid mmc device\n");
  79                 fastboot_fail("invalid mmc device");
  80                 return;
  81         }
  82
  83         if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
  84                 printf("%s: updating MBR, Primary and Backup GPT(s)\n",
  85                        __func__);
  86                 if (is_valid_gpt_buf(dev_desc, download_buffer)) {
  87                         printf("%s: invalid GPT - refusing to write to flash\n",
  88                                __func__);
  89                         fastboot_fail("invalid GPT partition");
  90                         return;
  91                 }
  92                 if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
  93                         printf("%s: writing GPT partitions failed\n", __func__);
  94                         fastboot_fail("writing GPT partitions failed");
  95                         return;
  96                 }
  97                 printf("........ success\n");
  98                 fastboot_okay("");
  99                 return;
 100         } else if (get_partition_info_efi_by_name(dev_desc, cmd, &info)) {
 101                 error("cannot find partition: '%s'\n", cmd);
 102                 fastboot_fail("cannot find partition");
 103                 return;
 104         }
 105
 106         if (is_sparse_image(download_buffer))
 107                 write_sparse_image(dev_desc, &info, cmd, download_buffer,
 108                                    download_bytes);
 109         else
 110                 write_raw_image(dev_desc, &info, cmd, download_buffer,
 111                                 download_bytes);
 112 }