1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/io.h>
#include <boardid.h>
#include <cbfs.h>
#include <console/console.h>
#include <gpio.h>
#include <soc/sdram.h>
#include <string.h>
#include <types.h>
static const char *sdram_configs[] = {
/* Samsung K4E6E304EB-EGCE */
[0] = "sdram-lpddr3-generic-4GB",
/* Hynix H9CCNNNBJTALAR */
[1] = "sdram-lpddr3-generic-4GB",
/* Samsung K4E8E324EB-EGCF */
[3] = "sdram-lpddr3-generic-2GB",
/* Micron MT52L256M32D1PF */
[4] = "sdram-lpddr3-generic-2GB",
/* Samsung K4E6E304EB-EGCE, duplicate to 0 */
[5] = "sdram-lpddr3-generic-4GB",
/* Micron MT52L512M32D2PF */
[6] = "sdram-lpddr3-generic-4GB",
};
static struct rk3399_sdram_params params;
enum dram_speeds {
dram_800MHz = 800,
dram_928MHz = 928,
};
static enum dram_speeds get_sdram_target_mhz(void)
{
if (IS_ENABLED(CONFIG_BOARD_GOOGLE_BOB) && board_id() < 4)
return dram_800MHz;
return dram_928MHz;
}
const struct rk3399_sdram_params *get_sdram_config()
{
char config_file[64];
uint32_t ramcode;
ramcode = ram_code();
if (ramcode >= ARRAY_SIZE(sdram_configs) ||
!snprintf(config_file, sizeof(config_file), "%s-%d",
sdram_configs[ramcode], get_sdram_target_mhz()) ||
(cbfs_boot_load_struct(config_file, ¶ms,
sizeof(params)) != sizeof(params)))
die("Cannot load SDRAM parameter file!");
return ¶ms;
}
|
