src/mainboard/gizmosphere/gizmo/mainboard.c

/* SPDX-License-Identifier: GPL-2.0-only */

#include <amdblocks/acpimmio.h>
#include <device/mmio.h>
#include <console/console.h>
#include <delay.h>
#include <device/device.h>
#include <device/pci_ops.h>

/**********************************************
 * Enable the dedicated functions of the board.
 **********************************************/
static void mainboard_enable(struct device *dev)
{
	printk(BIOS_INFO, "Mainboard " CONFIG_MAINBOARD_PART_NUMBER " Enable.\n");

	/* enable GPP CLK0 thru CLK1 */
	/* disable GPP CLK2 thru SLT_GFX_CLK */
	misc_write8(0, 0xFF);
	misc_write8(1, 0);
	misc_write8(2, 0);
	misc_write8(3, 0);
	misc_write8(4, 0);

	/*
	 * Force the onboard SATA port to GEN2 speed.
	 * The offboard SATA port can remain at GEN3.
	 */
	pm_write8(0xda, (pm_read8(0xda) & 0xfb) | 0x04);
}

static void mainboard_final(void *chip_info)
{
	struct device *ahci_dev;
	uintptr_t ABAR;
	u8 *memptr;

	ahci_dev = pcidev_on_root(0x11, 0);
	ABAR = pci_read_config32(ahci_dev, 0x24);
	ABAR &= 0xFFFFFC00;
	memptr = (u8 *)(ABAR + 0x100 + 0x80 + 0x2C); /* we're on the 2nd port */
	*memptr = 0x21; /* force to GEN2 and start re-negotiate */
	mdelay(1);
	*memptr = 0x20;
}

struct chip_operations mainboard_ops = {
	.enable_dev = mainboard_enable,
	.final = mainboard_final,
};