libpayload: configs: Add new config.featuretest to broaden CI
[coreboot.git] / src / mainboard / siemens / fa_ehl / mainboard.c
blobac16346f2a147992c4c0058a55de7541bcc30532
1 /* SPDX-License-Identifier: GPL-2.0-only */
3 #include <baseboard/variants.h>
4 #include <bootstate.h>
5 #include <console/console.h>
6 #include <device/device.h>
7 #include <device/pci_def.h>
8 #include <device/pci_ops.h>
9 #include <device/pci_ids.h>
10 #include <hwilib.h>
11 #include <i210.h>
12 #include <soc/gpio.h>
13 #include <soc/ramstage.h>
14 #include <string.h>
15 #include <timer.h>
16 #include <timestamp.h>
18 #define MAX_PATH_DEPTH 12
19 #define MAX_NUM_MAPPINGS 10
21 /** \brief This function can decide if a given MAC address is valid or not.
22 * Currently, addresses filled with 0xff or 0x00 are not valid.
23 * @param mac Buffer to the MAC address to check
24 * @return 0 if address is not valid, otherwise 1
26 static uint8_t is_mac_adr_valid(uint8_t mac[MAC_ADDR_LEN])
28 for (size_t i = 0; i < MAC_ADDR_LEN; i++) {
29 if (mac[i] != 0x00 && mac[i] != 0xff)
30 return 1;
31 if (mac[i] != mac[0])
32 return 1;
34 return 0;
37 /** \brief This function will search for a MAC address which can be assigned
38 * to a MACPHY.
39 * @param dev pointer to PCI device
40 * @param mac buffer where to store the MAC address
41 * @return cb_err CB_ERR or CB_SUCCESS
43 enum cb_err mainboard_get_mac_address(struct device *dev, uint8_t mac[MAC_ADDR_LEN])
45 struct bus *parent = dev->upstream;
46 uint8_t buf[16], mapping[16], i = 0, chain_len = 0;
48 memset(buf, 0, sizeof(buf));
49 memset(mapping, 0, sizeof(mapping));
51 /* The first entry in the tree is the device itself. */
52 buf[0] = dev->path.pci.devfn;
53 chain_len = 1;
54 for (i = 1; i < MAX_PATH_DEPTH && parent->dev->upstream->subordinate; i++) {
55 buf[i] = parent->dev->path.pci.devfn;
56 chain_len++;
57 parent = parent->dev->upstream;
59 if (i == MAX_PATH_DEPTH) {
60 /* The path is deeper than MAX_PATH_DEPTH devices, error. */
61 printk(BIOS_ERR, "Too many bridges for %s\n", dev_path(dev));
62 return CB_ERR;
65 * Now construct the mapping based on the device chain starting from
66 * root bridge device to the device itself.
68 mapping[0] = 1;
69 mapping[1] = chain_len;
70 for (i = 0; i < chain_len; i++)
71 mapping[i + 4] = buf[chain_len - i - 1];
73 /* Open main hwinfo block */
74 if (hwilib_find_blocks("hwinfo.hex") != CB_SUCCESS)
75 return CB_ERR;
76 /* Now try to find a valid MAC address in hwinfo for this mapping. */
77 for (i = 0; i < MAX_NUM_MAPPINGS; i++) {
78 if (hwilib_get_field(XMac1Mapping + i, buf, 16) != 16)
79 continue;
80 if (memcmp(buf, mapping, chain_len + 4))
81 continue;
82 /* There is a matching mapping available, get MAC address. */
83 if (hwilib_get_field(XMac1 + i, mac, MAC_ADDR_LEN) == MAC_ADDR_LEN) {
84 if (is_mac_adr_valid(mac))
85 return CB_SUCCESS;
87 return CB_ERR;
89 /* No MAC address found for */
90 return CB_ERR;
93 static void wait_for_legacy_dev(void *unused)
95 uint32_t legacy_delay, us_since_boot;
96 struct stopwatch sw;
98 /* Open main hwinfo block. */
99 if (hwilib_find_blocks("hwinfo.hex") != CB_SUCCESS)
100 return;
102 /* Get legacy delay parameter from hwinfo. */
103 if (hwilib_get_field(LegacyDelay, (uint8_t *)&legacy_delay,
104 sizeof(legacy_delay)) != sizeof(legacy_delay))
105 return;
107 us_since_boot = get_us_since_boot();
108 /* No need to wait if the time since boot is already long enough.*/
109 if (us_since_boot > legacy_delay)
110 return;
111 stopwatch_init_msecs_expire(&sw, (legacy_delay - us_since_boot) / 1000);
112 printk(BIOS_NOTICE, "Wait remaining %d of %d us for legacy devices...",
113 legacy_delay - us_since_boot, legacy_delay);
114 stopwatch_wait_until_expired(&sw);
115 printk(BIOS_NOTICE, "done!\n");
118 void mainboard_silicon_init_params(FSP_S_CONFIG *params)
120 /* Disable CPU power states (C-states) */
121 params->Cx = 0;
123 /* Set maximum package C-state to PkgC0C1 */
124 params->PkgCStateLimit = 0;
126 /* Disable P-States */
127 params->MaxRatio = 0;
129 /* Disable PMC low power modes */
130 params->PmcLpmS0ixSubStateEnableMask = 0;
131 params->PmcV1p05PhyExtFetControlEn = 0;
132 params->PmcV1p05IsExtFetControlEn = 0;
135 static void mainboard_init(void *chip_info)
137 const struct pad_config *pads;
138 size_t num;
140 pads = variant_gpio_table(&num);
141 gpio_configure_pads(pads, num);
144 static void mainboard_final(void *chip_info)
146 struct device *dev;
148 /* Do board specific things */
149 variant_mainboard_final();
151 if (CONFIG(PCI_ALLOW_BUS_MASTER_ANY_DEVICE)) {
152 /* Set Master Enable for on-board PCI devices if allowed. */
153 dev = dev_find_device(PCI_VID_SIEMENS, 0x403e, 0);
154 if (dev)
155 pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
157 dev = dev_find_device(PCI_VID_SIEMENS, 0x403f, 0);
158 if (dev)
159 pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
163 /* The following function performs board specific things. */
164 void __weak variant_mainboard_final(void)
168 struct chip_operations mainboard_ops = {
169 .init = mainboard_init,
170 .final = mainboard_final
173 BOOT_STATE_INIT_ENTRY(BS_DEV_ENUMERATE, BS_ON_ENTRY, wait_for_legacy_dev, NULL);