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/* SPDX-License-Identifier: GPL-2.0-only */
#include <baseboard/variants.h>
#include <bootstate.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include <hwilib.h>
#include <i210.h>
#include <soc/gpio.h>
#include <soc/ramstage.h>
#include <string.h>
#include <timer.h>
#include <timestamp.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[MAC_ADDR_LEN])
{
for (size_t i = 0; i < MAC_ADDR_LEN; i++) {
if (mac[i] != 0x00 && mac[i] != 0xff)
return 1;
if (mac[i] != mac[0])
return 1;
}
return 0;
}
/** \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[MAC_ADDR_LEN])
{
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)
continue;
if (memcmp(buf, mapping, chain_len + 4))
continue;
/* There is a matching mapping available, get MAC address. */
if (hwilib_get_field(XMac1 + i, mac, MAC_ADDR_LEN) == MAC_ADDR_LEN) {
if (is_mac_adr_valid(mac))
return CB_SUCCESS;
}
return CB_ERR;
}
/* No MAC address found for */
return CB_ERR;
}
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");
}
void mainboard_silicon_init_params(FSP_S_CONFIG *params)
{
/* Disable CPU power states (C-states) */
params->Cx = 0;
/* Set maximum package C-state to PkgC0C1 */
params->PkgCStateLimit = 0;
/* Disable P-States */
params->MaxRatio = 0;
/* Disable PMC low power modes */
params->PmcLpmS0ixSubStateEnableMask = 0;
params->PmcV1p05PhyExtFetControlEn = 0;
params->PmcV1p05IsExtFetControlEn = 0;
}
static void mainboard_init(void *chip_info)
{
const struct pad_config *pads;
size_t num;
pads = variant_gpio_table(&num);
gpio_configure_pads(pads, num);
}
static void mainboard_final(void *chip_info)
{
struct device *dev;
/* Do board specific things */
variant_mainboard_final();
if (CONFIG(PCI_ALLOW_BUS_MASTER_ANY_DEVICE)) {
/* Set Master Enable for on-board PCI devices if allowed. */
dev = dev_find_device(PCI_VENDOR_ID_SIEMENS, 0x403e, 0);
if (dev)
pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
dev = dev_find_device(PCI_VENDOR_ID_SIEMENS, 0x403f, 0);
if (dev)
pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
}
}
/* The following function performs board specific things. */
void __weak variant_mainboard_final(void)
{
}
struct chip_operations mainboard_ops = {
.init = mainboard_init,
.final = mainboard_final
};
BOOT_STATE_INIT_ENTRY(BS_DEV_ENUMERATE, BS_ON_ENTRY, wait_for_legacy_dev, NULL);
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