1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 *
6 * See README.rockchip for details of the rkspi format
7 */
8
9 #include "imagetool.h"
10 #include <image.h>
11 #include <rc4.h>
12 #include "mkimage.h"
13 #include "rkcommon.h"
14
15 enum {
16 RKSPI_SECT_LEN = RK_BLK_SIZE * 4,
17 };
18
rkspi_set_header(void * buf,struct stat * sbuf,int ifd,struct image_tool_params * params)19 static void rkspi_set_header(void *buf, struct stat *sbuf, int ifd,
20 struct image_tool_params *params)
21 {
22 int sector;
23 unsigned int size;
24
25 size = params->orig_file_size;
26
27 rkcommon_set_header(buf, sbuf, ifd, params);
28
29 /*
30 * Spread the image out so we only use the first 2KB of each 4KB
31 * region. This is a feature of the SPI format required by the Rockchip
32 * boot ROM. Its rationale is unknown.
33 */
34 if (params->vflag)
35 fprintf(stderr, "Spreading spi image from %u to %u\n",
36 size, params->file_size);
37
38 for (sector = size / RKSPI_SECT_LEN - 1; sector >= 0; sector--) {
39 debug("sector %u\n", sector);
40 memmove(buf + sector * RKSPI_SECT_LEN * 2,
41 buf + sector * RKSPI_SECT_LEN,
42 RKSPI_SECT_LEN);
43 memset(buf + sector * RKSPI_SECT_LEN * 2 + RKSPI_SECT_LEN,
44 '\0', RKSPI_SECT_LEN);
45 }
46 }
47
rkspi_check_image_type(uint8_t type)48 static int rkspi_check_image_type(uint8_t type)
49 {
50 if (type == IH_TYPE_RKSPI)
51 return EXIT_SUCCESS;
52 else
53 return EXIT_FAILURE;
54 }
55
56 /*
57 * The SPI payload needs to make space for odd half-sector layout used in flash
58 * (i.e. only the first 2K of each 4K sector is used).
59 */
rkspi_vrec_header(struct image_tool_params * params,struct image_type_params * tparams)60 static int rkspi_vrec_header(struct image_tool_params *params,
61 struct image_type_params *tparams)
62 {
63 rkcommon_vrec_header(params, tparams);
64
65 /*
66 * Converting to the SPI format (i.e. splitting each 4K page into two
67 * 2K subpages and then padding these 2K pages up to take a complete
68 * 4K sector again) which will double the image size.
69 */
70 params->file_size = ROUND(params->file_size, RKSPI_SECT_LEN) << 1;
71
72 /* Ignoring pad len, since we are using our own copy_image() */
73 return 0;
74 }
75
76 /*
77 * rk_spi parameters
78 */
79 U_BOOT_IMAGE_TYPE(
80 rkspi,
81 "Rockchip SPI Boot Image support",
82 0,
83 NULL,
84 rkcommon_check_params,
85 rkcommon_verify_header,
86 rkcommon_print_header,
87 rkspi_set_header,
88 NULL,
89 rkspi_check_image_type,
90 NULL,
91 rkspi_vrec_header
92 );
93