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 void rkspi_set_header(void *buf, struct stat *sbuf, int ifd, 21 struct image_tool_params *params) 22 { 23 int sector; 24 unsigned int size; 25 int ret; 26 27 size = params->orig_file_size; 28 ret = rkcommon_set_header(buf, size, params); 29 debug("size %x\n", size); 30 if (ret) { 31 /* TODO(sjg@chromium.org): This method should return an error */ 32 printf("Warning: SPL image is too large (size %#x) and will " 33 "not boot\n", size); 34 } 35 36 /* 37 * Spread the image out so we only use the first 2KB of each 4KB 38 * region. This is a feature of the SPI format required by the Rockchip 39 * boot ROM. Its rationale is unknown. 40 */ 41 for (sector = size / RKSPI_SECT_LEN - 1; sector >= 0; sector--) { 42 debug("sector %u\n", sector); 43 memmove(buf + sector * RKSPI_SECT_LEN * 2, 44 buf + sector * RKSPI_SECT_LEN, 45 RKSPI_SECT_LEN); 46 memset(buf + sector * RKSPI_SECT_LEN * 2 + RKSPI_SECT_LEN, 47 '\0', RKSPI_SECT_LEN); 48 } 49 } 50 51 static int rkspi_check_image_type(uint8_t type) 52 { 53 if (type == IH_TYPE_RKSPI) 54 return EXIT_SUCCESS; 55 else 56 return EXIT_FAILURE; 57 } 58 59 /* 60 * The SPI payload needs to be padded out to make space for odd half-sector 61 * layout used in flash (i.e. only the first 2K of each 4K sector is used). 62 */ 63 static int rkspi_vrec_header(struct image_tool_params *params, 64 struct image_type_params *tparams) 65 { 66 int padding = rkcommon_vrec_header(params, tparams, RK_INIT_SIZE_ALIGN); 67 /* 68 * The file size has not been adjusted at this point (our caller will 69 * eventually add the header/padding to the file_size), so we need to 70 * add up the header_size, file_size and padding ourselves. 71 */ 72 int padded_size = tparams->header_size + params->file_size + padding; 73 74 /* 75 * We need to store the original file-size (i.e. before padding), as 76 * imagetool does not set this during its adjustment of file_size. 77 */ 78 params->orig_file_size = padded_size; 79 80 /* 81 * Converting to the SPI format (i.e. splitting each 4K page into two 82 * 2K subpages and then padding these 2K pages up to take a complete 83 * 4K sector again) will will double the image size. 84 * 85 * Thus we return the padded_size as an additional padding requirement 86 * (be sure to add this to the padding returned from the common code). 87 */ 88 return padded_size + padding; 89 } 90 91 /* 92 * rk_spi parameters 93 */ 94 U_BOOT_IMAGE_TYPE( 95 rkspi, 96 "Rockchip SPI Boot Image support", 97 0, 98 NULL, 99 rkcommon_check_params, 100 rkcommon_verify_header, 101 rkcommon_print_header, 102 rkspi_set_header, 103 NULL, 104 rkspi_check_image_type, 105 NULL, 106 rkspi_vrec_header 107 ); 108