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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <soc/southbridge.h>
static void sata_init(struct device *dev)
{
/**************************************
* 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)
u32 *ahci_ptr = (void *)(uintptr_t)ALIGN_DOWN(
pci_read_config32(dev, AHCI_BASE_ADDRESS_REG), 256);
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);
};
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 unsigned short pci_device_ids[] = {
PCI_DEVICE_ID_AMD_CZ_SATA,
PCI_DEVICE_ID_AMD_CZ_SATA_AHCI,
0
};
static const struct pci_driver sata0_driver __pci_driver = {
.ops = &sata_ops,
.vendor = PCI_VENDOR_ID_AMD,
.devices = pci_device_ids,
};
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