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