summaryrefslogtreecommitdiff
path: root/src/mainboard/siemens/mc_apl1/mainboard.c
blob: fd19cd13aeceb939981a3cb73ceeff20a41aa761 (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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
/*
 * This file is part of the coreboot project.
 *
 * Copyright 2016 Google Inc.
 * Copyright (C) 2017 Siemens AG
 *
 * 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 <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <gpio.h>
#include <hwilib.h>
#include <i210.h>
#include <intelblocks/lpc_lib.h>
#include <intelblocks/pcr.h>
#include <soc/pci_devs.h>
#include <soc/pcr_ids.h>
#include <string.h>
#include <bootstate.h>
#include <timer.h>
#include <timestamp.h>
#include "brd_gpio.h"
#include "ptn3460.h"

#define MAX_PATH_DEPTH		12
#define MAX_NUM_MAPPINGS	10

/** \brief This function can decide if a given MAC address is valid or not.
 *         Currently, addresses filled with 0xff or 0x00 are not valid.
 * @param  mac  Buffer to the MAC address to check
 * @return 0    if address is not valid, otherwise 1
 */
static uint8_t is_mac_adr_valid(uint8_t mac[6])
{
	uint8_t buf[6];

	memset(buf, 0, sizeof(buf));
	if (!memcmp(buf, mac, sizeof(buf)))
		return 0;
	memset(buf, 0xff, sizeof(buf));
	if (!memcmp(buf, mac, sizeof(buf)))
		return 0;
	return 1;
}

/** \brief This function will search for a MAC address which can be assigned
 *         to a MACPHY.
 * @param  dev     pointer to PCI device
 * @param  mac     buffer where to store the MAC address
 * @return cb_err  CB_ERR or CB_SUCCESS
 */
enum cb_err mainboard_get_mac_address(struct device *dev, uint8_t mac[6])
{
	struct bus *parent = dev->bus;
	uint8_t buf[16], mapping[16], i = 0, chain_len = 0;

	memset(buf, 0, sizeof(buf));
	memset(mapping, 0, sizeof(mapping));

	/* The first entry in the tree is the device itself. */
	buf[0] = dev->path.pci.devfn;
	chain_len = 1;
	for (i = 1; i < MAX_PATH_DEPTH && parent->dev->bus->subordinate; i++) {
		buf[i] = parent->dev->path.pci.devfn;
		chain_len++;
		parent = parent->dev->bus;
	}
	if (i == MAX_PATH_DEPTH) {
		/* The path is deeper than MAX_PATH_DEPTH devices, error. */
		printk(BIOS_ERR, "Too many bridges for %s\n", dev_path(dev));
		return CB_ERR;
	}
	/*
	 * Now construct the mapping based on the device chain starting from
	 * root bridge device to the device itself.
	 */
	mapping[0] = 1;
	mapping[1] = chain_len;
	for (i = 0; i < chain_len; i++)
		mapping[i + 4] = buf[chain_len - i - 1];

	/* Open main hwinfo block */
	if (hwilib_find_blocks("hwinfo.hex") != CB_SUCCESS)
		return CB_ERR;
	/* Now try to find a valid MAC address in hwinfo for this mapping.*/
	for (i = 0; i < MAX_NUM_MAPPINGS; i++) {
		if ((hwilib_get_field(XMac1Mapping + i, buf, 16) == 16) &&
			!(memcmp(buf, mapping, chain_len + 4))) {
		/* There is a matching mapping available, get MAC address. */
			if ((hwilib_get_field(XMac1 + i, mac, 6) == 6) &&
			    (is_mac_adr_valid(mac))) {
				return CB_SUCCESS;
			} else {
				return CB_ERR;
			}
		} else
			continue;
	}
	/* No MAC address found for */
	return CB_ERR;
}

static void mainboard_init(void *chip_info)
{
	const struct pad_config *pads;
	size_t num;

	pads = brd_gpio_table(&num);
	gpio_configure_pads(pads, num);
}

static void mainboard_final(void *chip_info)
{
	int status;
	uint16_t cmd = 0;
	device_t dev = NULL;

	/**
	 * Set up the DP2LVDS converter.
	 * ptn3460_init() may only be executed after i2c bus init.
	 */
	status = ptn3460_init("hwinfo.hex");
	if (status)
		printk(BIOS_ERR, "LCD: Set up PTN with status 0x%x\n", status);
	else
		printk(BIOS_INFO, "LCD: Set up PTN was successful.\n");

	/* Enable additional I/O decoding range on LPC for COM 3 */
	lpc_open_pmio_window(0x3e8, 8);

	/* Set Master Enable for on-board PCI device. */
	dev = dev_find_device(PCI_VENDOR_ID_SIEMENS, 0x403f, 0);
	if (dev) {
		cmd = pci_read_config16(dev, PCI_COMMAND);
		cmd |= PCI_COMMAND_MASTER;
		pci_write_config16(dev, PCI_COMMAND, cmd);
	}

	/*
	 * PIR6 register mapping for PCIe root ports
	 * INTA#->PIRQB#, INTB#->PIRQC#, INTC#->PIRQD#, INTD#-> PIRQA#
	 */
	pcr_write16(PID_ITSS, 0x314c, 0x0321);
}

static void wait_for_legacy_dev(void *unused)
{
	uint32_t legacy_delay, us_since_boot;
	struct stopwatch sw;

	/* Open main hwinfo block. */
	if (hwilib_find_blocks("hwinfo.hex") != CB_SUCCESS)
		return;

	/* Get legacy delay parameter from hwinfo. */
	if (hwilib_get_field(LegacyDelay, (uint8_t *) &legacy_delay,
			      sizeof(legacy_delay)) != sizeof(legacy_delay))
		return;

	us_since_boot = get_us_since_boot();
	/* No need to wait if the time since boot is already long enough.*/
	if (us_since_boot > legacy_delay)
		return;
	stopwatch_init_msecs_expire(&sw, (legacy_delay - us_since_boot) / 1000);
	printk(BIOS_NOTICE, "Wait remaining %d of %d us for legacy devices...",
			legacy_delay - us_since_boot, legacy_delay);
	stopwatch_wait_until_expired(&sw);
	printk(BIOS_NOTICE, "done!\n");
}

static void finalize_boot(void *unused)
{
	/* Set coreboot ready LED. */
	gpio_output(CNV_RGI_DT, 1);
}

BOOT_STATE_INIT_ENTRY(BS_DEV_ENUMERATE, BS_ON_ENTRY, wait_for_legacy_dev, NULL);
BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_BOOT, BS_ON_ENTRY, finalize_boot, NULL);

struct chip_operations mainboard_ops = {
	.init = mainboard_init,
	.final = mainboard_final,
};