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_SPL_HDR_START     = RK_CODE1_OFFSET * RK_BLK_SIZE,
  18         RKSPI_SPL_START         = RKSPI_SPL_HDR_START + 4,
  19         RKSPI_HEADER_LEN        = RKSPI_SPL_START,
  20         RKSPI_SECT_LEN          = RK_BLK_SIZE * 4,
  21 };
  22
  23 static char dummy_hdr[RKSPI_HEADER_LEN];
  24
  25 static int rkspi_check_params(struct image_tool_params *params)
  26 {
  27         return 0;
  28 }
  29
  30 static int rkspi_verify_header(unsigned char *buf, int size,
  31                                struct image_tool_params *params)
  32 {
  33         return 0;
  34 }
  35
  36 static void rkspi_print_header(const void *buf)
  37 {
  38 }
  39
  40 static void rkspi_set_header(void *buf, struct stat *sbuf, int ifd,
  41                              struct image_tool_params *params)
  42 {
  43         int sector;
  44         unsigned int size;
  45         int ret;
  46
  47         size = params->orig_file_size;
  48         ret = rkcommon_set_header(buf, size);
  49         debug("size %x\n", size);
  50         if (ret) {
  51                 /* TODO(sjg@chromium.org): This method should return an error */
  52                 printf("Warning: SPL image is too large (size %#x) and will not boot\n",
  53                        size);
  54         }
  55
  56         memcpy(buf + RKSPI_SPL_HDR_START, "RK32", 4);
  57
  58         /*
  59          * Spread the image out so we only use the first 2KB of each 4KB
  60          * region. This is a feature of the SPI format required by the Rockchip
  61          * boot ROM. Its rationale is unknown.
  62          */
  63         for (sector = size / RKSPI_SECT_LEN - 1; sector >= 0; sector--) {
  64                 printf("sector %u\n", sector);
  65                 memmove(buf + sector * RKSPI_SECT_LEN * 2,
  66                         buf + sector * RKSPI_SECT_LEN,
  67                         RKSPI_SECT_LEN);
  68                 memset(buf + sector * RKSPI_SECT_LEN * 2 + RKSPI_SECT_LEN,
  69                        '\0', RKSPI_SECT_LEN);
  70         }
  71 }
  72
  73 static int rkspi_extract_subimage(void *buf, struct image_tool_params *params)
  74 {
  75         return 0;
  76 }
  77
  78 static int rkspi_check_image_type(uint8_t type)
  79 {
  80         if (type == IH_TYPE_RKSPI)
  81                 return EXIT_SUCCESS;
  82         else
  83                 return EXIT_FAILURE;
  84 }
  85
  86 /* We pad the file out to a fixed size - this method returns that size */
  87 static int rkspi_vrec_header(struct image_tool_params *params,
  88                              struct image_type_params *tparams)
  89 {
  90         int pad_size;
  91
  92         pad_size = (RK_MAX_CODE1_SIZE + 0x7ff) / 0x800 * 0x800;
  93         params->orig_file_size = pad_size;
  94
  95         /* We will double the image size due to the SPI format */
  96         pad_size *= 2;
  97         pad_size += RKSPI_SPL_HDR_START;
  98         debug("pad_size %x\n", pad_size);
  99
 100         return pad_size - params->file_size;
 101 }
 102
 103 /*
 104  * rk_spi parameters
 105  */
 106 U_BOOT_IMAGE_TYPE(
 107         rkspi,
 108         "Rockchip SPI Boot Image support",
 109         RKSPI_HEADER_LEN,
 110         dummy_hdr,
 111         rkspi_check_params,
 112         rkspi_verify_header,
 113         rkspi_print_header,
 114         rkspi_set_header,
 115         rkspi_extract_subimage,
 116         rkspi_check_image_type,
 117         NULL,
 118         rkspi_vrec_header
 119 );