sata.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_def.h>
#include <amdblocks/sata.h>
#include <soc/southbridge.h>
 
void soc_enable_sata_features(struct device *dev)
{
        u8 *ahci_ptr;
        u32 misc_ctl, cap_cfg;
 
        u32 temp;
 
        /* unlock the write-protect */
        misc_ctl = pci_read_config32(dev, SATA_MISC_CONTROL_REG);
        misc_ctl |= SATA_MISC_SUBCLASS_WREN;
        pci_write_config32(dev, SATA_MISC_CONTROL_REG, misc_ctl);
 
        /* set the SATA AHCI mode to allow port expanders */
        ahci_ptr = (u8 *)(uintptr_t)ALIGN_DOWN(
                pci_read_config32(dev, PCI_BASE_ADDRESS_5), 256);
 
        cap_cfg = read32(ahci_ptr + SATA_CAPABILITIES_REG);
        cap_cfg |= SATA_CAPABILITY_SPM;
        write32(ahci_ptr + SATA_CAPABILITIES_REG, cap_cfg);
 
        /* lock the write-protect */
        temp = pci_read_config32(dev, SATA_MISC_CONTROL_REG);
        temp &= ~SATA_MISC_SUBCLASS_WREN;
        pci_write_config32(dev, SATA_MISC_CONTROL_REG, temp);
};