sata.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
 
#include "hudson.h"
 
static void sata_init(struct device *dev)
{
#if CONFIG(SOUTHBRIDGE_AMD_AGESA_YANGTZE)
        /**************************************
         * Configure the SATA port multiplier *
         **************************************/
        #define BYTE_TO_DWORD_OFFSET(x) (x/4)
        #define AHCI_BASE_ADDRESS_REG 0x24
        #define MISC_CONTROL_REG 0x40
        #define UNLOCK_BIT (1<<0)
        #define SATA_CAPABILITIES_REG 0xFC
        #define CFG_CAP_SPM (1<<12)
 
        volatile u32 *ahci_ptr =
                (u32*)(uintptr_t)(pci_read_config32(dev, AHCI_BASE_ADDRESS_REG) & 0xFFFFFF00);
        u32 temp;
 
        /* unlock the write-protect */
        temp = pci_read_config32(dev, MISC_CONTROL_REG);
        temp |= UNLOCK_BIT;
        pci_write_config32(dev, MISC_CONTROL_REG, temp);
 
        /* set the SATA AHCI mode to allow port expanders */
        *(ahci_ptr + BYTE_TO_DWORD_OFFSET(SATA_CAPABILITIES_REG)) |= CFG_CAP_SPM;
 
        /* lock the write-protect */
        temp = pci_read_config32(dev, MISC_CONTROL_REG);
        temp &= ~UNLOCK_BIT;
        pci_write_config32(dev, MISC_CONTROL_REG, temp);
#endif
};
 
static struct pci_operations lops_pci = {
        /* .set_subsystem = pci_dev_set_subsystem, */
};
 
static struct device_operations sata_ops = {
        .read_resources = pci_dev_read_resources,
        .set_resources = pci_dev_set_resources,
        .enable_resources = pci_dev_enable_resources,
        .init = sata_init,
        .ops_pci = &lops_pci,
};
 
static const struct pci_driver sata0_driver __pci_driver = {
        .ops = &sata_ops,
        .vendor = PCI_VID_AMD,
        .device = PCI_DID_AMD_SB900_SATA,
};
 
static const struct pci_driver sata0_driver_ahci __pci_driver = {
        .ops = &sata_ops,
        .vendor = PCI_VID_AMD,
        .device = PCI_DID_AMD_SB900_SATA_AHCI,
};