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soc/intel/elkhartlake: Provide ability to update TSN GbE MAC addresses 

This patch provides the functionality to change the TSN GbE MAC
addresses. Prerequisite for this is a mainboard specific function that
returns a matching MAC address.

A test was performed with the next patch in the series, which enables
the TSN GbE driver for mc_ehl2 mainboard.

Change-Id: I2303a64cfd09fa02734ca9452d26591af2a76221
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63863
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
This commit is contained in:
Mario Scheithauer 2022-04-26 14:16:59 +02:00 committed by Felix Held
parent cf0236972d
commit d691c216c2
2 changed files with 41 additions and 0 deletions
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9
src/soc/intel/elkhartlake/include/soc/tsn_gbe.h
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@ -3,4 +3,13 @@
#ifndef _SOC_ELKHARTLAKE_TSN_GBE_H_
#define _SOC_ELKHARTLAKE_TSN_GBE_H_
#define MAC_ADDR_LEN 6
#define TSN_MAC_ADD0_HIGH 0x300 /* MAC Address0 High register */
#define TSN_MAC_ADD0_LOW 0x304 /* MAC Address0 Low register */
/* We need one function we can call to get a MAC address to use. */
/* This function can be coded somewhere else but must exist. */
enum cb_err mainboard_get_mac_address(struct device *dev, uint8_t mac[MAC_ADDR_LEN]);
#endif /* _SOC_ELKHARTLAKE_TSN_GBE_H_ */

32
src/soc/intel/elkhartlake/tsn_gbe.c
View File

@ -5,10 +5,42 @@
#include <device/pci_ids.h>
#include <soc/tsn_gbe.h>
static void program_mac_address(struct device *dev, void *base)
{
enum cb_err status;
uint8_t mac[MAC_ADDR_LEN];
/* Check first whether there is a valid MAC address available */
status = mainboard_get_mac_address(dev, mac);
if (status != CB_SUCCESS) {
printk(BIOS_INFO, "TSN GbE: No valid MAC address found\n");
return;
}
printk(BIOS_DEBUG, "TSN GbE: Programming MAC Address...\n");
/* Write the upper 16 bits of the first 6-byte MAC address */
clrsetbits32((void *)(base + TSN_MAC_ADD0_HIGH), 0xffff, ((mac[5] << 8) | mac[4]));
/* Write the lower 32 bits of the first 6-byte MAC address */
clrsetbits32((void *)(base + TSN_MAC_ADD0_LOW), 0xffffffff,
(mac[3] << 24) | (mac[2] << 16) | (mac[1] << 8) | mac[0]);
}
static void gbe_tsn_init(struct device *dev)
{
/* Get the base address of the I/O registers in memory space */
struct resource *gbe_tsn_res = find_resource(dev, PCI_BASE_ADDRESS_0);
uintptr_t io_mem_base = gbe_tsn_res->base;
/* Program MAC address */
program_mac_address(dev, (void *)io_mem_base);
}
static struct device_operations gbe_tsn_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = gbe_tsn_init,
};
static const unsigned short gbe_tsn_device_ids[] = { 0x4b32, 0x4ba0, 0x4bb0, 0 };