xref: /openbmc/u-boot/tools/rkspi.c (revision cb1cbdd9)
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 char dummy_hdr[RK_IMAGE_HEADER_LEN];
21 
22 static int rkspi_verify_header(unsigned char *buf, int size,
23 			       struct image_tool_params *params)
24 {
25 	return 0;
26 }
27 
28 static void rkspi_print_header(const void *buf)
29 {
30 }
31 
32 static void rkspi_set_header(void *buf, struct stat *sbuf, int ifd,
33 			     struct image_tool_params *params)
34 {
35 	int sector;
36 	unsigned int size;
37 	int ret;
38 
39 	size = params->orig_file_size;
40 	ret = rkcommon_set_header(buf, size, params);
41 	debug("size %x\n", size);
42 	if (ret) {
43 		/* TODO(sjg@chromium.org): This method should return an error */
44 		printf("Warning: SPL image is too large (size %#x) and will not boot\n",
45 		       size);
46 	}
47 
48 	memcpy(buf + RK_SPL_HDR_START, rkcommon_get_spl_hdr(params),
49 	       RK_SPL_HDR_SIZE);
50 
51 	/*
52 	 * Spread the image out so we only use the first 2KB of each 4KB
53 	 * region. This is a feature of the SPI format required by the Rockchip
54 	 * boot ROM. Its rationale is unknown.
55 	 */
56 	for (sector = size / RKSPI_SECT_LEN - 1; sector >= 0; sector--) {
57 		debug("sector %u\n", sector);
58 		memmove(buf + sector * RKSPI_SECT_LEN * 2,
59 			buf + sector * RKSPI_SECT_LEN,
60 			RKSPI_SECT_LEN);
61 		memset(buf + sector * RKSPI_SECT_LEN * 2 + RKSPI_SECT_LEN,
62 		       '\0', RKSPI_SECT_LEN);
63 	}
64 }
65 
66 static int rkspi_extract_subimage(void *buf, struct image_tool_params *params)
67 {
68 	return 0;
69 }
70 
71 static int rkspi_check_image_type(uint8_t type)
72 {
73 	if (type == IH_TYPE_RKSPI)
74 		return EXIT_SUCCESS;
75 	else
76 		return EXIT_FAILURE;
77 }
78 
79 /* We pad the file out to a fixed size - this method returns that size */
80 static int rkspi_vrec_header(struct image_tool_params *params,
81 			     struct image_type_params *tparams)
82 {
83 	int pad_size;
84 
85 	pad_size = (rkcommon_get_spl_size(params) + 0x7ff) / 0x800 * 0x800;
86 	params->orig_file_size = pad_size;
87 
88 	/* We will double the image size due to the SPI format */
89 	pad_size *= 2;
90 	pad_size += RK_SPL_HDR_START;
91 	debug("pad_size %x\n", pad_size);
92 
93 	return pad_size - params->file_size;
94 }
95 
96 /*
97  * rk_spi parameters
98  */
99 U_BOOT_IMAGE_TYPE(
100 	rkspi,
101 	"Rockchip SPI Boot Image support",
102 	RK_IMAGE_HEADER_LEN,
103 	dummy_hdr,
104 	rkcommon_check_params,
105 	rkspi_verify_header,
106 	rkspi_print_header,
107 	rkspi_set_header,
108 	rkspi_extract_subimage,
109 	rkspi_check_image_type,
110 	NULL,
111 	rkspi_vrec_header
112 );
113