summaryrefslogtreecommitdiff
path: root/src/mainboard/google/samus/spd/spd.c
blob: f8b0bf2ea926e22c58b251c193372eb54e2ce867 (plain)
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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc.
 */

#include <cbfs.h>
#include <console/console.h>
#include <endian.h>
#include <string.h>
#include <soc/gpio.h>
#include <soc/pei_data.h>
#include <soc/romstage.h>
#include <ec/google/chromeec/ec.h>
#include <mainboard/google/samus/ec.h>
#include <mainboard/google/samus/gpio.h>
#include <mainboard/google/samus/spd/spd.h>

static void mainboard_print_spd_info(uint8_t spd[])
{
	const int spd_banks[8] = {  8, 16, 32, 64, -1, -1, -1, -1 };
	const int spd_capmb[8] = {  1,  2,  4,  8, 16, 32, 64,  0 };
	const int spd_rows[8]  = { 12, 13, 14, 15, 16, -1, -1, -1 };
	const int spd_cols[8]  = {  9, 10, 11, 12, -1, -1, -1, -1 };
	const int spd_ranks[8] = {  1,  2,  3,  4, -1, -1, -1, -1 };
	const int spd_devw[8]  = {  4,  8, 16, 32, -1, -1, -1, -1 };
	const int spd_busw[8]  = {  8, 16, 32, 64, -1, -1, -1, -1 };
	char spd_name[SPD_PART_LEN+1] = { 0 };

	int banks = spd_banks[(spd[SPD_DENSITY_BANKS] >> 4) & 7];
	int capmb = spd_capmb[spd[SPD_DENSITY_BANKS] & 7] * 256;
	int rows  = spd_rows[(spd[SPD_ADDRESSING] >> 3) & 7];
	int cols  = spd_cols[spd[SPD_ADDRESSING] & 7];
	int ranks = spd_ranks[(spd[SPD_ORGANIZATION] >> 3) & 7];
	int devw  = spd_devw[spd[SPD_ORGANIZATION] & 7];
	int busw  = spd_busw[spd[SPD_BUS_DEV_WIDTH] & 7];

	/* Module type */
	printk(BIOS_INFO, "SPD: module type is ");
	switch (spd[SPD_DRAM_TYPE]) {
	case SPD_DRAM_DDR3:
		printk(BIOS_INFO, "DDR3\n");
		break;
	case SPD_DRAM_LPDDR3:
		printk(BIOS_INFO, "LPDDR3\n");
		break;
	default:
		printk(BIOS_INFO, "Unknown (%02x)\n", spd[SPD_DRAM_TYPE]);
		break;
	}

	/* Module Part Number */
	memcpy(spd_name, &spd[SPD_PART_OFF], SPD_PART_LEN);
	spd_name[SPD_PART_LEN] = 0;
	printk(BIOS_INFO, "SPD: module part is %s\n", spd_name);

	printk(BIOS_INFO, "SPD: banks %d, ranks %d, rows %d, columns %d, "
	       "density %d Mb\n", banks, ranks, rows, cols, capmb);
	printk(BIOS_INFO, "SPD: device width %d bits, bus width %d bits\n",
	       devw, busw);

	if (capmb > 0 && busw > 0 && devw > 0 && ranks > 0) {
		/* SIZE = DENSITY / 8 * BUS_WIDTH / SDRAM_WIDTH * RANKS */
		printk(BIOS_INFO, "SPD: module size is %u MB (per channel)\n",
		       capmb / 8 * busw / devw * ranks);
	}
}

/* Copy SPD data for on-board memory */
void mainboard_fill_spd_data(struct pei_data *pei_data)
{
	int spd_bits[4] = {
		SPD_GPIO_BIT0,
		SPD_GPIO_BIT1,
		SPD_GPIO_BIT2,
		SPD_GPIO_BIT3
	};
	int spd_gpio[4];
	int spd_index;
	int spd_file_len;
	struct cbfs_file *spd_file;

	spd_gpio[0] = get_gpio(spd_bits[0]);
	spd_gpio[1] = get_gpio(spd_bits[1]);
	spd_gpio[2] = get_gpio(spd_bits[2]);
	spd_gpio[3] = get_gpio(spd_bits[3]);

	spd_index = (spd_gpio[3] << 3) | (spd_gpio[2] << 2) |
		(spd_gpio[1] << 1) | spd_gpio[0];

	printk(BIOS_DEBUG, "SPD: index %d (GPIO%d=%d GPIO%d=%d "
	       "GPIO%d=%d GPIO%d=%d)\n", spd_index,
	       spd_bits[3], spd_gpio[3], spd_bits[2], spd_gpio[2],
	       spd_bits[1], spd_gpio[1], spd_bits[0], spd_gpio[0]);

	spd_file = cbfs_get_file(CBFS_DEFAULT_MEDIA, "spd.bin");
	if (!spd_file)
		die("SPD data not found.");
	spd_file_len = ntohl(spd_file->len);

	if (spd_file_len < ((spd_index + 1) * SPD_LEN)) {
		printk(BIOS_ERR, "SPD index override to 0 - old hardware?\n");
		spd_index = 0;
	}

	if (spd_file_len < SPD_LEN)
		die("Missing SPD data.");

	/* Assume same memory in both channels */
	spd_index *= SPD_LEN;
	memcpy(pei_data->spd_data[0][0],
	       ((char*)CBFS_SUBHEADER(spd_file)) + spd_index, SPD_LEN);
	memcpy(pei_data->spd_data[1][0],
	       ((char*)CBFS_SUBHEADER(spd_file)) + spd_index, SPD_LEN);

	/* Make sure a valid SPD was found */
	if (pei_data->spd_data[0][0][0] == 0)
		die("Invalid SPD data.");

	mainboard_print_spd_info(pei_data->spd_data[0][0]);
}