1  /* SPDX-License-Identifier: GPL-2.0-only */
 2  
 3  #include <boardid.h>
 4  #include <cbfs.h>
 5  #include <console/console.h>
 6  #include <gpio.h>
 7  #include <soc/sdram.h>
 8  #include <stdio.h>
 9  #include <types.h>
10  
11  static const char *sdram_configs[] = {
12  	/* Samsung K4E6E304EB-EGCE */
13  	[0] = "sdram-lpddr3-generic-4GB",
14  
15  	/* Hynix H9CCNNNBJTALAR */
16  	[1] = "sdram-lpddr3-generic-4GB",
17  
18  	/* Samsung K4E8E324EB-EGCF */
19  	[3] = "sdram-lpddr3-generic-2GB",
20  
21  	/* Micron MT52L256M32D1PF */
22  	[4] = "sdram-lpddr3-generic-2GB",
23  
24  	/* Samsung K4E6E304EB-EGCE, duplicate to 0 */
25  	[5] = "sdram-lpddr3-generic-4GB",
26  
27  	/* Micron MT52L512M32D2PF */
28  	[6] = "sdram-lpddr3-generic-4GB",
29  };
30  
31  static struct rk3399_sdram_params params;
32  
33  enum dram_speeds {
34  	dram_800MHz = 800,
35  	dram_928MHz = 928,
36  };
37  
38  static enum dram_speeds get_sdram_target_mhz(void)
39  {
40  	if (CONFIG(BOARD_GOOGLE_BOB) && board_id() < 4)
41  		return dram_800MHz;
42  
43  	return dram_928MHz;
44  }
45  
46  const struct rk3399_sdram_params *get_sdram_config(void)
47  {
48  	char config_file[64];
49  	uint32_t ramcode;
50  
51  	ramcode = ram_code();
52  	if (ramcode >= ARRAY_SIZE(sdram_configs) ||
53  	    !snprintf(config_file, sizeof(config_file), "%s-%d",
54  	    sdram_configs[ramcode], get_sdram_target_mhz()) ||
55  	    (cbfs_load(config_file, &params, sizeof(params)) != sizeof(params)))
56  		die("Cannot load SDRAM parameter file!");
57  
58  	return &params;
59  }