tools/lpc32xximage.c

   1 /*
   2  * Image manipulator for LPC32XX SoCs
   3  *
   4  * (C) Copyright 2015  DENX Software Engineering GmbH
   5  * Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr>
   6  *
   7  * Derived from omapimage.c:
   8  *
   9  * (C) Copyright 2010
  10  * Linaro LTD, www.linaro.org
  11  * Author: John Rigby <john.rigby@linaro.org>
  12  * Based on TI's signGP.c
  13  *
  14  * (C) Copyright 2009
  15  * Stefano Babic, DENX Software Engineering, sbabic@denx.de.
  16  *
  17  * (C) Copyright 2008
  18  * Marvell Semiconductor <www.marvell.com>
  19  * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
  20  *
  21  * SPDX-License-Identifier:     GPL-2.0+
  22  */
  23
  24 #include "imagetool.h"
  25 #include <compiler.h>
  26 #include <image.h>
  27
  28 /*
  29  * NAND page 0 boot header
  30  */
  31
  32 struct nand_page_0_boot_header {
  33         uint32_t data[129];
  34         uint32_t pad[383];
  35 };
  36
  37 /*
  38  * Default ICC (interface configuration data [sic]) if none specified
  39  * in board config
  40  */
  41
  42 #ifndef LPC32XX_BOOT_ICR
  43 #define LPC32XX_BOOT_ICR 0x00000096
  44 #endif
  45
  46 /*
  47  * Default boot NAND page size if none specified in board config
  48  */
  49
  50 #ifndef LPC32XX_BOOT_NAND_PAGESIZE
  51 #define LPC32XX_BOOT_NAND_PAGESIZE 2048
  52 #endif
  53
  54 /*
  55  * Default boot NAND pages per sector if none specified in board config
  56  */
  57
  58 #ifndef LPC32XX_BOOT_NAND_PAGES_PER_SECTOR
  59 #define LPC32XX_BOOT_NAND_PAGES_PER_SECTOR 64
  60 #endif
  61
  62 /*
  63  * Maximum size for boot code is 56K unless defined in board config
  64  */
  65
  66 #ifndef LPC32XX_BOOT_CODESIZE
  67 #define LPC32XX_BOOT_CODESIZE (56*1024)
  68 #endif
  69
  70 /* signature byte for a readable block */
  71
  72 #define LPC32XX_BOOT_BLOCK_OK 0xaa
  73
  74 static struct nand_page_0_boot_header lpc32xximage_header;
  75
  76 static int lpc32xximage_check_image_types(uint8_t type)
  77 {
  78         if (type == IH_TYPE_LPC32XXIMAGE)
  79                 return EXIT_SUCCESS;
  80         return EXIT_FAILURE;
  81 }
  82
  83 static int lpc32xximage_verify_header(unsigned char *ptr, int image_size,
  84                         struct image_tool_params *params)
  85 {
  86         struct nand_page_0_boot_header *hdr =
  87                 (struct nand_page_0_boot_header *)ptr;
  88
  89         /* turn image size from bytes to NAND pages, page 0 included */
  90         int image_size_in_pages = ((image_size - 1)
  91                                   / LPC32XX_BOOT_NAND_PAGESIZE);
  92
  93         if (hdr->data[0] != (0xff & LPC32XX_BOOT_ICR))
  94                 return -1;
  95         if (hdr->data[1] != (0xff & ~LPC32XX_BOOT_ICR))
  96                 return -1;
  97         if (hdr->data[2] != (0xff & LPC32XX_BOOT_ICR))
  98                 return -1;
  99         if (hdr->data[3] != (0xff & ~LPC32XX_BOOT_ICR))
 100                 return -1;
 101         if (hdr->data[4] != (0xff & image_size_in_pages))
 102                 return -1;
 103         if (hdr->data[5] != (0xff & ~image_size_in_pages))
 104                 return -1;
 105         if (hdr->data[6] != (0xff & image_size_in_pages))
 106                 return -1;
 107         if (hdr->data[7] != (0xff & ~image_size_in_pages))
 108                 return -1;
 109         if (hdr->data[8] != (0xff & image_size_in_pages))
 110                 return -1;
 111         if (hdr->data[9] != (0xff & ~image_size_in_pages))
 112                 return -1;
 113         if (hdr->data[10] != (0xff & image_size_in_pages))
 114                 return -1;
 115         if (hdr->data[11] != (0xff & ~image_size_in_pages))
 116                 return -1;
 117         if (hdr->data[12] != LPC32XX_BOOT_BLOCK_OK)
 118                 return -1;
 119         if (hdr->data[128] != LPC32XX_BOOT_BLOCK_OK)
 120                 return -1;
 121         return 0;
 122 }
 123
 124 static void print_hdr_byte(struct nand_page_0_boot_header *hdr, int ofs)
 125 {
 126         printf("header[%d] = %02x\n", ofs, hdr->data[ofs]);
 127 }
 128
 129 static void lpc32xximage_print_header(const void *ptr)
 130 {
 131         struct nand_page_0_boot_header *hdr =
 132                 (struct nand_page_0_boot_header *)ptr;
 133         int ofs;
 134
 135         for (ofs = 0; ofs <= 12; ofs++)
 136                 print_hdr_byte(hdr, ofs);
 137         print_hdr_byte(hdr, 128);
 138 }
 139
 140 static void lpc32xximage_set_header(void *ptr, struct stat *sbuf, int ifd,
 141                                 struct image_tool_params *params)
 142 {
 143         struct nand_page_0_boot_header *hdr =
 144                 (struct nand_page_0_boot_header *)ptr;
 145
 146         /* turn image size from bytes to NAND pages, page 0 included */
 147         int image_size_in_pages = ((sbuf->st_size
 148                                   + LPC32XX_BOOT_NAND_PAGESIZE - 1)
 149                                   / LPC32XX_BOOT_NAND_PAGESIZE);
 150
 151         /* fill header -- default byte value is 0x00, not 0xFF */
 152         memset((void *)hdr, 0, sizeof(*hdr));
 153         hdr->data[0] = (hdr->data[2] = 0xff & LPC32XX_BOOT_ICR);
 154         hdr->data[1] = (hdr->data[3] = 0xff & ~LPC32XX_BOOT_ICR);
 155         hdr->data[4] = (hdr->data[6] = (hdr->data[8]
 156                        = (hdr->data[10] = 0xff & image_size_in_pages)));
 157         hdr->data[5] = (hdr->data[7] = (hdr->data[9]
 158                        = (hdr->data[11] = 0xff & ~image_size_in_pages)));
 159         hdr->data[12] = (hdr->data[128] = LPC32XX_BOOT_BLOCK_OK);
 160 }
 161
 162 /*
 163  * lpc32xximage parameters
 164  */
 165 U_BOOT_IMAGE_TYPE(
 166         lpc32xximage,
 167         "LPC32XX Boot Image",
 168         sizeof(lpc32xximage_header),
 169         (void *)&lpc32xximage_header,
 170         NULL,
 171         lpc32xximage_verify_header,
 172         lpc32xximage_print_header,
 173         lpc32xximage_set_header,
 174         NULL,
 175         lpc32xximage_check_image_types,
 176         NULL,
 177         NULL
 178 );