On Fri, 2017-12-22 at 13:39 +0800, honghui.zh...@mediatek.com wrote: > From: Honghui Zhang <honghui.zh...@mediatek.com> > > The hardware default value of IDs and class type is not correct, > fix that by setup the correct values before start up. > > Signed-off-by: Honghui Zhang <honghui.zh...@mediatek.com> > --- > drivers/pci/host/pcie-mediatek.c | 12 ++++++++++++ > include/linux/pci_ids.h | 3 +++ > 2 files changed, 15 insertions(+) > > diff --git a/drivers/pci/host/pcie-mediatek.c > b/drivers/pci/host/pcie-mediatek.c > index fc29a9a..0ef33e4 100644 > --- a/drivers/pci/host/pcie-mediatek.c > +++ b/drivers/pci/host/pcie-mediatek.c > @@ -74,6 +74,10 @@ > > /* PCIe V2 per-port registers */ > #define PCIE_MSI_VECTOR 0x0c0 > + > +#define PCIE_CONF_ID 0x100 > +#define PCIE_CONF_CLASS 0x104 > + > #define PCIE_INT_MASK 0x420 > #define INTX_MASK GENMASK(19, 16) > #define INTX_SHIFT 16 > @@ -393,6 +397,14 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port > *port) > val |= PCIE_CSR_LTSSM_EN(port->slot) | > PCIE_CSR_ASPM_L1_EN(port->slot); > writel(val, pcie->base + PCIE_SYS_CFG_V2); > + > + /* Set up vendor ID and device ID for MT7622*/ > + val = PCI_VENDOR_ID_MEDIATEK | (PCI_DEVICE_ID_MT7622 << 16); > + writel(val, port->base + PCIE_CONF_ID);
IMHO, this is a general function so you can ignore "device ID for MT7622" here, but just make sure class code/vendor ID correct. > + /* Set up class code for MT7622 */ > + val = PCI_CLASS_BRIDGE_PCI << 16; > + writel(val, port->base + PCIE_CONF_CLASS); > } > > /* Assert all reset signals */ > diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h > index ab20dc5..000c5df 100644 > --- a/include/linux/pci_ids.h > +++ b/include/linux/pci_ids.h > @@ -2113,6 +2113,9 @@ > > #define PCI_VENDOR_ID_MYRICOM 0x14c1 > > +#define PCI_VENDOR_ID_MEDIATEK 0x14c3 > +#define PCI_DEVICE_ID_MT7622 0x5396 > + > #define PCI_VENDOR_ID_TITAN 0x14D2 > #define PCI_DEVICE_ID_TITAN_010L 0x8001 > #define PCI_DEVICE_ID_TITAN_100L 0x8010
