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/*
* This file is part of the coreboot project.
*
* Copyright 2018 Facebook, Inc.
* Copyright 2003-2017 Cavium Inc. <support@cavium.com>
* Copyright 2019 9elements Agency GmbH
*
* 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.
*
* Derived from Cavium's BSD-3 Clause OCTEONTX-SDK-6.2.0.
*/
#include <device/pci_ops.h>
#include <device/pci_def.h>
#include <device/pci.h>
#include <soc/addressmap.h>
#include <soc/ecam.h>
#include <assert.h>
/**
* Get PCI BAR address from cavium specific extended capability.
* Use regular BAR if not found in extended capability space.
*
* @return The pyhsical address of the BAR, zero on error
*/
#ifdef __SIMPLE_DEVICE__
uint64_t ecam0_get_bar_val(pci_devfn_t dev, u8 bar)
#else
uint64_t ecam0_get_bar_val(struct device *dev, u8 bar)
#endif
{
size_t cap_offset = pci_find_capability(dev, 0x14);
uint64_t h, l, ret = 0;
if (cap_offset) {
/* Found EA */
u8 es, bei;
u8 ne = pci_read_config8(dev, cap_offset + 2) & 0x3f;
cap_offset += 4;
while (ne) {
uint32_t dw0 = pci_read_config32(dev, cap_offset);
es = dw0 & 7;
bei = (dw0 >> 4) & 0xf;
if (bei == bar) {
h = 0;
l = pci_read_config32(dev, cap_offset + 4);
if (l & 2)
h = pci_read_config32(dev,
cap_offset + 12);
ret = (h << 32) | (l & ~0xfull);
break;
}
cap_offset += (es + 1) * 4;
ne--;
}
} else {
h = 0;
l = pci_read_config32(dev, bar * 4 + PCI_BASE_ADDRESS_0);
if (l & 4)
h = pci_read_config32(dev, bar * 4 + PCI_BASE_ADDRESS_0
+ 4);
ret = (h << 32) | (l & ~0xfull);
}
return ret;
}
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