mainboard/siemens/fa_ehl: Add new mainboard based on mc_ehl2
Add a new mainboard called fa_ehl which is based on Siemens's
'mc_ehl2'. This commit simply copies the mainboard directory and
adjusts the naming to match the new board's name. Moreover a variants
scheme is provided for possible alternative implementations. Follow-up
commits will introduce the needed changes for the new mainboard.
Change-Id: Ia389c8812d14db8b663547e6336e900becbc8be6
Signed-off-by: Johannes Hahn <johannes-hahn@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76444
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Jan Samek <jan.samek@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Uwe Poeche <uwe.poeche@siemens.com>
diff --git a/src/mainboard/siemens/fa_ehl/mainboard.c b/src/mainboard/siemens/fa_ehl/mainboard.c
new file mode 100644
index 0000000..7aa0d86
--- /dev/null
+++ b/src/mainboard/siemens/fa_ehl/mainboard.c
@@ -0,0 +1,173 @@
+/* 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_VID_SIEMENS, 0x403e, 0);
+ if (dev)
+ pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
+
+ dev = dev_find_device(PCI_VID_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);