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 " 43 "not boot\n", 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 /* 75 * The SPI payload needs to be padded out to make space for odd half-sector 76 * layout used in flash (i.e. only the first 2K of each 4K sector is used). 77 */ 78 static int rkspi_vrec_header(struct image_tool_params *params, 79 struct image_type_params *tparams) 80 { 81 int padding = rkcommon_vrec_header(params, tparams, 2048); 82 /* 83 * The file size has not been adjusted at this point (our caller will 84 * eventually add the header/padding to the file_size), so we need to 85 * add up the header_size, file_size and padding ourselves. 86 */ 87 int padded_size = tparams->header_size + params->file_size + padding; 88 89 /* 90 * We need to store the original file-size (i.e. before padding), as 91 * imagetool does not set this during its adjustment of file_size. 92 */ 93 params->orig_file_size = padded_size; 94 95 /* 96 * Converting to the SPI format (i.e. splitting each 4K page into two 97 * 2K subpages and then padding these 2K pages up to take a complete 98 * 4K sector again) will will double the image size. 99 * 100 * Thus we return the padded_size as an additional padding requirement 101 * (be sure to add this to the padding returned from the common code). 102 */ 103 return padded_size + padding; 104 } 105 106 /* 107 * rk_spi parameters 108 */ 109 U_BOOT_IMAGE_TYPE( 110 rkspi, 111 "Rockchip SPI Boot Image support", 112 0, 113 NULL, 114 rkcommon_check_params, 115 rkspi_verify_header, 116 rkspi_print_header, 117 rkspi_set_header, 118 rkspi_extract_subimage, 119 rkspi_check_image_type, 120 NULL, 121 rkspi_vrec_header 122 ); 123