tools/rkspi.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 rkspi 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         RKSPI_SECT_LEN          = RK_BLK_SIZE * 4,
  18 };
  19
  20 static char dummy_hdr[RK_IMAGE_HEADER_LEN];
  21
  22 static int rkspi_verify_header(unsigned char *buf, int size,
  23                                struct image_tool_params *params)
  24 {
  25         return 0;
  26 }
  27
  28 static void rkspi_print_header(const void *buf)
  29 {
  30 }
  31
  32 static void rkspi_set_header(void *buf, struct stat *sbuf, int ifd,
  33                              struct image_tool_params *params)
  34 {
  35         int sector;
  36         unsigned int size;
  37         int ret;
  38
  39         size = params->orig_file_size;
  40         ret = rkcommon_set_header(buf, size, params);
  41         debug("size %x\n", size);
  42         if (ret) {
  43                 /* TODO(sjg@chromium.org): This method should return an error */
  44                 printf("Warning: SPL image is too large (size %#x) and will not boot\n",
  45                        size);
  46         }
  47
  48         memcpy(buf + RK_SPL_HDR_START, rkcommon_get_spl_hdr(params),
  49                RK_SPL_HDR_SIZE);
  50
  51         /*
  52          * Spread the image out so we only use the first 2KB of each 4KB
  53          * region. This is a feature of the SPI format required by the Rockchip
  54          * boot ROM. Its rationale is unknown.
  55          */
  56         for (sector = size / RKSPI_SECT_LEN - 1; sector >= 0; sector--) {
  57                 debug("sector %u\n", sector);
  58                 memmove(buf + sector * RKSPI_SECT_LEN * 2,
  59                         buf + sector * RKSPI_SECT_LEN,
  60                         RKSPI_SECT_LEN);
  61                 memset(buf + sector * RKSPI_SECT_LEN * 2 + RKSPI_SECT_LEN,
  62                        '\0', RKSPI_SECT_LEN);
  63         }
  64 }
  65
  66 static int rkspi_extract_subimage(void *buf, struct image_tool_params *params)
  67 {
  68         return 0;
  69 }
  70
  71 static int rkspi_check_image_type(uint8_t type)
  72 {
  73         if (type == IH_TYPE_RKSPI)
  74                 return EXIT_SUCCESS;
  75         else
  76                 return EXIT_FAILURE;
  77 }
  78
  79 /* We pad the file out to a fixed size - this method returns that size */
  80 static int rkspi_vrec_header(struct image_tool_params *params,
  81                              struct image_type_params *tparams)
  82 {
  83         int pad_size;
  84
  85         pad_size = (rkcommon_get_spl_size(params) + 0x7ff) / 0x800 * 0x800;
  86         params->orig_file_size = pad_size;
  87
  88         /* We will double the image size due to the SPI format */
  89         pad_size *= 2;
  90         pad_size += RK_SPL_HDR_START;
  91         debug("pad_size %x\n", pad_size);
  92
  93         return pad_size - params->file_size;
  94 }
  95
  96 /*
  97  * rk_spi parameters
  98  */
  99 U_BOOT_IMAGE_TYPE(
 100         rkspi,
 101         "Rockchip SPI Boot Image support",
 102         RK_IMAGE_HEADER_LEN,
 103         dummy_hdr,
 104         rkcommon_check_params,
 105         rkspi_verify_header,
 106         rkspi_print_header,
 107         rkspi_set_header,
 108         rkspi_extract_subimage,
 109         rkspi_check_image_type,
 110         NULL,
 111         rkspi_vrec_header
 112 );