1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <cbfs.h>
4 #include <console/console.h>
5 #include <device/dram/ddr3.h>
6 #include <soc/gpio.h>
7 #include <soc/mrc_wrapper.h>
8 #include <soc/romstage.h>
9 #include <variant/variant.h>
10
get_spd_pointer(char * spd_file_content,int total_spds,int * dual)11 static void *get_spd_pointer(char *spd_file_content, int total_spds, int *dual)
12 {
13 int ram_id = 0;
14
15 /* The ram_id[2:0] pullups are too large for the default 20K
16 * pulldown on the pad. Therefore, disable the internal pull resistor to
17 * read high values correctly. */
18 ssus_disable_internal_pull(GPIO_SSUS_37_PAD);
19 ssus_disable_internal_pull(GPIO_SSUS_38_PAD);
20 ssus_disable_internal_pull(GPIO_SSUS_39_PAD);
21 #ifdef GPIO_SSUS_40_PAD_USE_PULLDOWN
22 /* To prevent floating pin on shipped systems. */
23 ssus_enable_internal_pull(GPIO_SSUS_40_PAD, PAD_PULL_DOWN | PAD_PU_20K);
24 #elif defined(GPIO_SSUS_40_PAD)
25 ssus_disable_internal_pull(GPIO_SSUS_40_PAD);
26 #endif
27 ram_id |= (ssus_get_gpio(GPIO_SSUS_37_PAD) << 0);
28 ram_id |= (ssus_get_gpio(GPIO_SSUS_38_PAD) << 1);
29 ram_id |= (ssus_get_gpio(GPIO_SSUS_39_PAD) << 2);
30 #ifdef GPIO_SSUS_40_PAD
31 ram_id |= (ssus_get_gpio(GPIO_SSUS_40_PAD) << 3);
32 #endif
33 printk(BIOS_DEBUG, "ram_id=%d, total_spds: %d\n", ram_id, total_spds);
34
35 if (ram_id >= total_spds)
36 return NULL;
37
38 /* Single channel configs */
39 if (dual_channel_config & (1 << ram_id))
40 *dual = 1;
41
42 return &spd_file_content[SPD_SIZE_MAX_DDR3 * ram_id];
43 }
44
mainboard_fill_mrc_params(struct mrc_params * mp)45 void mainboard_fill_mrc_params(struct mrc_params *mp)
46 {
47 void *spd_content;
48 int dual_channel = 0;
49 void *spd_file;
50 size_t spd_fsize;
51
52 spd_file = cbfs_map("spd.bin", &spd_fsize);
53 if (!spd_file)
54 die("SPD data not found.");
55
56 spd_content = get_spd_pointer(spd_file, spd_fsize / SPD_SIZE_MAX_DDR3,
57 &dual_channel);
58
59 mp->mainboard.dram_type = DRAM_DDR3L;
60 mp->mainboard.dram_info_location = DRAM_INFO_SPD_MEM,
61 mp->mainboard.weaker_odt_settings = 1,
62
63 mp->mainboard.dram_data[0] = spd_content;
64 if (dual_channel)
65 mp->mainboard.dram_data[1] = spd_content;
66 }
67