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_HEADER0_START      = 64 * RK_BLK_SIZE,
  18         RKSD_SPL_HDR_START      = RKSD_HEADER0_START +
  19                                         RK_CODE1_OFFSET * RK_BLK_SIZE,
  20         RKSD_SPL_START          = RKSD_SPL_HDR_START + 4,
  21         RKSD_HEADER_LEN         = RKSD_SPL_START,
  22 };
  23
  24 static char dummy_hdr[RKSD_HEADER_LEN];
  25
  26 static int rksd_check_params(struct image_tool_params *params)
  27 {
  28         return 0;
  29 }
  30
  31 static int rksd_verify_header(unsigned char *buf,  int size,
  32                                  struct image_tool_params *params)
  33 {
  34         return 0;
  35 }
  36
  37 static void rksd_print_header(const void *buf)
  38 {
  39 }
  40
  41 static void rksd_set_header(void *buf,  struct stat *sbuf,  int ifd,
  42                                struct image_tool_params *params)
  43 {
  44         unsigned int size;
  45         int ret;
  46
  47         /* Zero the whole header. The first 32KB is empty */
  48         memset(buf,  '\0',  RKSD_HEADER0_START);
  49
  50         size = params->file_size - RKSD_SPL_HDR_START;
  51         ret = rkcommon_set_header(buf + RKSD_HEADER0_START, size);
  52         if (ret) {
  53                 /* TODO(sjg@chromium.org): This method should return an error */
  54                 printf("Warning: SPL image is too large (size %#x) and will not boot\n",
  55                        size);
  56         }
  57
  58         memcpy(buf + RKSD_SPL_HDR_START, "RK32", 4);
  59 }
  60
  61 static int rksd_extract_subimage(void *buf,  struct image_tool_params *params)
  62 {
  63         return 0;
  64 }
  65
  66 static int rksd_check_image_type(uint8_t type)
  67 {
  68         if (type == IH_TYPE_RKSD)
  69                 return EXIT_SUCCESS;
  70         else
  71                 return EXIT_FAILURE;
  72 }
  73
  74 /* We pad the file out to a fixed size - this method returns that size */
  75 static int rksd_vrec_header(struct image_tool_params *params,
  76                             struct image_type_params *tparams)
  77 {
  78         int pad_size;
  79
  80         pad_size = RKSD_SPL_HDR_START + RK_MAX_CODE1_SIZE;
  81         debug("pad_size %x\n", pad_size);
  82
  83         return pad_size - params->file_size;
  84 }
  85
  86 /*
  87  * rk_sd parameters
  88  */
  89 U_BOOT_IMAGE_TYPE(
  90         rksd,
  91         "Rockchip SD Boot Image support",
  92         RKSD_HEADER_LEN,
  93         dummy_hdr,
  94         rksd_check_params,
  95         rksd_verify_header,
  96         rksd_print_header,
  97         rksd_set_header,
  98         rksd_extract_subimage,
  99         rksd_check_image_type,
 100         NULL,
 101         rksd_vrec_header
 102 );