tools/rksd.c

   1 /*
   2  * (C) Copyright 2015 Google,  Inc
   3  * Written by Simon Glass <sjg@chromium.org>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  *
   7  * See README.rockchip for details of the rksd format
   8  */
   9
  10 #include "imagetool.h"
  11 #include <image.h>
  12 #include <rc4.h>
  13 #include "mkimage.h"
  14 #include "rkcommon.h"
  15
  16 enum {
  17         RKSD_SPL_HDR_START      = RK_INIT_OFFSET * RK_BLK_SIZE,
  18         RKSD_SPL_START          = RKSD_SPL_HDR_START + 4,
  19         RKSD_HEADER_LEN         = RKSD_SPL_START,
  20 };
  21
  22 static char dummy_hdr[RKSD_HEADER_LEN];
  23
  24 static int rksd_check_params(struct image_tool_params *params)
  25 {
  26         return 0;
  27 }
  28
  29 static int rksd_verify_header(unsigned char *buf,  int size,
  30                                  struct image_tool_params *params)
  31 {
  32         return 0;
  33 }
  34
  35 static void rksd_print_header(const void *buf)
  36 {
  37 }
  38
  39 static void rksd_set_header(void *buf,  struct stat *sbuf,  int ifd,
  40                                struct image_tool_params *params)
  41 {
  42         unsigned int size;
  43         int ret;
  44
  45         size = params->file_size - RKSD_SPL_HDR_START;
  46         ret = rkcommon_set_header(buf, size);
  47         if (ret) {
  48                 /* TODO(sjg@chromium.org): This method should return an error */
  49                 printf("Warning: SPL image is too large (size %#x) and will not boot\n",
  50                        size);
  51         }
  52
  53         memcpy(buf + RKSD_SPL_HDR_START, CONFIG_ROCKCHIP_SPL_HDR, 4);
  54 }
  55
  56 static int rksd_extract_subimage(void *buf,  struct image_tool_params *params)
  57 {
  58         return 0;
  59 }
  60
  61 static int rksd_check_image_type(uint8_t type)
  62 {
  63         if (type == IH_TYPE_RKSD)
  64                 return EXIT_SUCCESS;
  65         else
  66                 return EXIT_FAILURE;
  67 }
  68
  69 /* We pad the file out to a fixed size - this method returns that size */
  70 static int rksd_vrec_header(struct image_tool_params *params,
  71                             struct image_type_params *tparams)
  72 {
  73         int pad_size;
  74
  75         pad_size = RKSD_SPL_HDR_START + CONFIG_ROCKCHIP_MAX_SPL_SIZE;
  76         debug("pad_size %x\n", pad_size);
  77
  78         return pad_size - params->file_size;
  79 }
  80
  81 /*
  82  * rk_sd parameters
  83  */
  84 U_BOOT_IMAGE_TYPE(
  85         rksd,
  86         "Rockchip SD Boot Image support",
  87         RKSD_HEADER_LEN,
  88         dummy_hdr,
  89         rksd_check_params,
  90         rksd_verify_header,
  91         rksd_print_header,
  92         rksd_set_header,
  93         rksd_extract_subimage,
  94         rksd_check_image_type,
  95         NULL,
  96         rksd_vrec_header
  97 );