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[u-boot] / board / compulab / common / splash.c
1 /*
2  * (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
3  *
4  * Authors: Igor Grinberg <grinberg@compulab.co.il>
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8
9 #include <common.h>
10 #include <nand.h>
11 #include <bmp_layout.h>
12
13 DECLARE_GLOBAL_DATA_PTR;
14
15 #ifdef CONFIG_CMD_NAND
16 static int splash_load_from_nand(u32 bmp_load_addr, int nand_offset)
17 {
18         struct bmp_header *bmp_hdr;
19         int res;
20         size_t bmp_size, bmp_header_size = sizeof(struct bmp_header);
21
22         if (bmp_load_addr + bmp_header_size >= gd->start_addr_sp)
23                 goto splash_address_too_high;
24
25         res = nand_read_skip_bad(&nand_info[nand_curr_device],
26                         nand_offset, &bmp_header_size,
27                         NULL, nand_info[nand_curr_device].size,
28                         (u_char *)bmp_load_addr);
29         if (res < 0)
30                 return res;
31
32         bmp_hdr = (struct bmp_header *)bmp_load_addr;
33         bmp_size = le32_to_cpu(bmp_hdr->file_size);
34
35         if (bmp_load_addr + bmp_size >= gd->start_addr_sp)
36                 goto splash_address_too_high;
37
38         return nand_read_skip_bad(&nand_info[nand_curr_device],
39                         nand_offset, &bmp_size,
40                         NULL, nand_info[nand_curr_device].size,
41                         (u_char *)bmp_load_addr);
42
43 splash_address_too_high:
44         printf("Error: splashimage address too high. Data overwrites U-Boot "
45                 "and/or placed beyond DRAM boundaries.\n");
46
47         return -1;
48 }
49 #else
50 static inline int splash_load_from_nand(u32 bmp_load_addr, int nand_offset)
51 {
52         return -1;
53 }
54 #endif /* CONFIG_CMD_NAND */
55
56 int cl_splash_screen_prepare(int nand_offset)
57 {
58         char *env_splashimage_value;
59         u32 bmp_load_addr;
60
61         env_splashimage_value = getenv("splashimage");
62         if (env_splashimage_value == NULL)
63                 return -1;
64
65         bmp_load_addr = simple_strtoul(env_splashimage_value, 0, 16);
66         if (bmp_load_addr == 0) {
67                 printf("Error: bad splashimage address specified\n");
68                 return -1;
69         }
70
71         return splash_load_from_nand(bmp_load_addr, nand_offset);
72 }