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_INIT_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, CONFIG_ROCKCHIP_SPL_HDR, 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 = (CONFIG_ROCKCHIP_MAX_SPL_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 ); 120