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pci-quirk.c
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pci-quirk.c
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// SPDX-License-Identifier: Apache-2.0
/*
* Deal with PCI device quirks
*
* Copyright 2017-2018 IBM Corp.
*/
#define pr_fmt(fmt) "PCI-QUIRK: " fmt
#include <skiboot.h>
#include <pci.h>
#include <pci-quirk.h>
#include <platform.h>
#include <ast.h>
static void quirk_astbmc_vga(struct phb *phb __unused,
struct pci_device *pd)
{
struct dt_node *np = pd->dn;
uint32_t revision, mcr_configuration, mcr_scu_mpll, mcr_scu_strap;
if (ast_sio_is_enabled()) {
revision = ast_ahb_readl(SCU_REVISION_ID);
mcr_configuration = ast_ahb_readl(MCR_CONFIGURATION);
mcr_scu_mpll = ast_ahb_readl(MCR_SCU_MPLL);
mcr_scu_strap = ast_ahb_readl(MCR_SCU_STRAP);
} else {
/* Previously we would warn, now SIO disabled by design */
prlog(PR_INFO, "Assumed platform default parameters for %s\n",
__func__);
revision = bmc_platform->hw->scu_revision_id;
mcr_configuration = bmc_platform->hw->mcr_configuration;
mcr_scu_mpll = bmc_platform->hw->mcr_scu_mpll;
mcr_scu_strap = bmc_platform->hw->mcr_scu_strap;
}
dt_add_property_cells(np, "aspeed,scu-revision-id", revision);
dt_add_property_cells(np, "aspeed,mcr-configuration", mcr_configuration);
dt_add_property_cells(np, "aspeed,mcr-scu-mpll", mcr_scu_mpll);
dt_add_property_cells(np, "aspeed,mcr-scu-strap", mcr_scu_strap);
}
/* Quirks are: {fixup function, vendor ID, (device ID or PCI_ANY_ID)} */
static const struct pci_quirk quirk_table[] = {
/* ASPEED 2400 VGA device */
{ 0x1a03, 0x2000, &quirk_astbmc_vga },
{ 0, 0, NULL }
};
static void __pci_handle_quirk(struct phb *phb, struct pci_device *pd,
const struct pci_quirk *quirks)
{
while (quirks->vendor_id) {
if (quirks->vendor_id == PCI_VENDOR_ID(pd->vdid) &&
(quirks->device_id == PCI_ANY_ID ||
quirks->device_id == PCI_DEVICE_ID(pd->vdid)))
quirks->fixup(phb, pd);
quirks++;
}
}
void pci_handle_quirk(struct phb *phb, struct pci_device *pd)
{
__pci_handle_quirk(phb, pd, quirk_table);
}