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Message-ID: <CA+V-a8v9CTSYSmctukk-da3hE3r3o=LvjdUi-ax_c8+KaFbB8Q@mail.gmail.com>
Date: Wed, 27 Nov 2019 20:51:07 +0000
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Kishon Vijay Abraham I <kishon@...com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Magnus Damm <magnus.damm@...il.com>,
Marek Vasut <marek.vasut+renesas@...il.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
linux-pci <linux-pci@...r.kernel.org>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Andrew Murray <andrew.murray@....com>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
LAK <linux-arm-kernel@...ts.infradead.org>,
Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
Chris Paterson <Chris.Paterson2@...esas.com>,
"Lad, Prabhakar" <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH 1/5] pci: pcie-rcar: preparation for adding endpoint support
Hi Kishon,
On Wed, Nov 27, 2019 at 4:56 AM Kishon Vijay Abraham I <kishon@...com> wrote:
>
> Hi Prabhakar,
>
> On 07/11/19 1:06 AM, Lad Prabhakar wrote:
> > From: "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@...renesas.com>
> >
> > this patch prepares for adding endpoint support to rcar controller,
> > there are no functional changes with this patch, a common file is
> > created so that it can be shared with endpoint driver.
> >
> > Signed-off-by: Lad, Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > ---
> > arch/arm64/configs/defconfig | 2 +-
> > arch/arm64/configs/renesas_defconfig | 2 +-
> > drivers/pci/controller/Kconfig | 4 +-
> > drivers/pci/controller/Makefile | 2 +-
> > drivers/pci/controller/pcie-rcar-host.c | 1058 +++++++++++++++++++
> > drivers/pci/controller/pcie-rcar.c | 1231 +----------------------
>
> Can you create this patch using "git format-patch -M", so that only whatever
> changed appears here.
>
sure will do that in the next version.
Cheers,
--Prabhakar
> Thanks
> Kishon
>
> > drivers/pci/controller/pcie-rcar.h | 129 +++
> > 7 files changed, 1245 insertions(+), 1183 deletions(-)
> > create mode 100644 drivers/pci/controller/pcie-rcar-host.c
> > create mode 100644 drivers/pci/controller/pcie-rcar.h
> >
> > diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> > index 7d16f10a9251..f67ce0ccea1d 100644
> > --- a/arch/arm64/configs/defconfig
> > +++ b/arch/arm64/configs/defconfig
> > @@ -186,7 +186,7 @@ CONFIG_HOTPLUG_PCI=y
> > CONFIG_HOTPLUG_PCI_ACPI=y
> > CONFIG_PCI_AARDVARK=y
> > CONFIG_PCI_TEGRA=y
> > -CONFIG_PCIE_RCAR=y
> > +CONFIG_PCIE_RCAR_HOST=y
> > CONFIG_PCI_HOST_GENERIC=y
> > CONFIG_PCI_XGENE=y
> > CONFIG_PCIE_ALTERA=y
> > diff --git a/arch/arm64/configs/renesas_defconfig b/arch/arm64/configs/renesas_defconfig
> > index f7411e8807d6..75fc418377c5 100644
> > --- a/arch/arm64/configs/renesas_defconfig
> > +++ b/arch/arm64/configs/renesas_defconfig
> > @@ -91,7 +91,7 @@ CONFIG_PCIEPORTBUS=y
> > CONFIG_HOTPLUG_PCI_PCIE=y
> > CONFIG_PCI_IOV=y
> > CONFIG_HOTPLUG_PCI=y
> > -CONFIG_PCIE_RCAR=y
> > +CONFIG_PCIE_RCAR_HOST=y
> > CONFIG_PCI_HOST_GENERIC=y
> > CONFIG_DEVTMPFS=y
> > CONFIG_DEVTMPFS_MOUNT=y
> > diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
> > index 70e078238899..01c238e5ea1e 100644
> > --- a/drivers/pci/controller/Kconfig
> > +++ b/drivers/pci/controller/Kconfig
> > @@ -82,12 +82,12 @@ config PCI_RCAR_GEN2
> > There are 3 internal PCI controllers available with a single
> > built-in EHCI/OHCI host controller present on each one.
> >
> > -config PCIE_RCAR
> > +config PCIE_RCAR_HOST
> > bool "Renesas R-Car PCIe controller"
> > depends on ARCH_RENESAS || COMPILE_TEST
> > depends on PCI_MSI_IRQ_DOMAIN
> > help
> > - Say Y here if you want PCIe controller support on R-Car SoCs.
> > + Say Y here if you want PCIe controller support on R-Car SoCs in host mode.
> >
> > config PCI_HOST_COMMON
> > bool
> > diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
> > index a2a22c9d91af..3577902a0d40 100644
> > --- a/drivers/pci/controller/Makefile
> > +++ b/drivers/pci/controller/Makefile
> > @@ -9,7 +9,7 @@ obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o
> > obj-$(CONFIG_PCI_AARDVARK) += pci-aardvark.o
> > obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o
> > obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o
> > -obj-$(CONFIG_PCIE_RCAR) += pcie-rcar.o
> > +obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar.o pcie-rcar-host.o
> > obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o
> > obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o
> > obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o
> > diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c
> > new file mode 100644
> > index 000000000000..645ef3e41e27
> > --- /dev/null
> > +++ b/drivers/pci/controller/pcie-rcar-host.c
> > @@ -0,0 +1,1058 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * PCIe driver for Renesas R-Car SoCs
> > + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd
> > + *
> > + * Based on:
> > + * arch/sh/drivers/pci/pcie-sh7786.c
> > + * arch/sh/drivers/pci/ops-sh7786.c
> > + * Copyright (C) 2009 - 2011 Paul Mundt
> > + *
> > + * Author: Phil Edworthy <phil.edworthy@...esas.com>
> > + */
> > +
> > +#include <linux/clk.h>
> > +#include <linux/delay.h>
> > +#include <linux/msi.h>
> > +#include <linux/of_address.h>
> > +#include <linux/of_irq.h>
> > +#include <linux/of_pci.h>
> > +#include <linux/of_platform.h>
> > +#include <linux/pci.h>
> > +#include <linux/phy/phy.h>
> > +
> > +#include "pcie-rcar.h"
> > +
> > +struct rcar_msi {
> > + DECLARE_BITMAP(used, INT_PCI_MSI_NR);
> > + struct irq_domain *domain;
> > + struct msi_controller chip;
> > + unsigned long pages;
> > + struct mutex lock; /* serializes msi */
> > + int irq1;
> > + int irq2;
> > +};
> > +
> > +static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip)
> > +{
> > + return container_of(chip, struct rcar_msi, chip);
> > +}
> > +
> > +/* Structure representing the PCIe interface */
> > +struct rcar_pcie {
> > + struct device *dev;
> > + struct phy *phy;
> > + void __iomem *base;
> > + struct list_head resources;
> > + int root_bus_nr;
> > + struct clk *bus_clk;
> > + struct rcar_msi msi;
> > +};
> > +
> > +static u32 rcar_read_conf(struct rcar_pcie *pcie, int where)
> > +{
> > + unsigned int shift = BITS_PER_BYTE * (where & 3);
> > + u32 val = rcar_pci_read_reg(pcie->base, where & ~3);
> > +
> > + return val >> shift;
> > +}
> > +
> > +/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */
> > +static int
> > +rcar_pcie_config_access(struct rcar_pcie *pcie,
> > + unsigned char access_type, struct pci_bus *bus,
> > + unsigned int devfn, int where, u32 *data)
> > +{
> > + unsigned int dev, func, reg, index;
> > +
> > + dev = PCI_SLOT(devfn);
> > + func = PCI_FUNC(devfn);
> > + reg = where & ~3;
> > + index = reg / 4;
> > +
> > + /*
> > + * While each channel has its own memory-mapped extended config
> > + * space, it's generally only accessible when in endpoint mode.
> > + * When in root complex mode, the controller is unable to target
> > + * itself with either type 0 or type 1 accesses, and indeed, any
> > + * controller initiated target transfer to its own config space
> > + * result in a completer abort.
> > + *
> > + * Each channel effectively only supports a single device, but as
> > + * the same channel <-> device access works for any PCI_SLOT()
> > + * value, we cheat a bit here and bind the controller's config
> > + * space to devfn 0 in order to enable self-enumeration. In this
> > + * case the regular ECAR/ECDR path is sidelined and the mangled
> > + * config access itself is initiated as an internal bus transaction.
> > + */
> > + if (pci_is_root_bus(bus)) {
> > + if (dev != 0)
> > + return PCIBIOS_DEVICE_NOT_FOUND;
> > +
> > + if (access_type == RCAR_PCI_ACCESS_READ) {
> > + *data = rcar_pci_read_reg(pcie->base, PCICONF(index));
> > + } else {
> > + /* Keep an eye out for changes to the root bus number */
> > + if (pci_is_root_bus(bus) && reg == PCI_PRIMARY_BUS)
> > + pcie->root_bus_nr = *data & 0xff;
> > +
> > + rcar_pci_write_reg(pcie->base, *data, PCICONF(index));
> > + }
> > +
> > + return PCIBIOS_SUCCESSFUL;
> > + }
> > +
> > + if (pcie->root_bus_nr < 0)
> > + return PCIBIOS_DEVICE_NOT_FOUND;
> > +
> > + /* Clear errors */
> > + rcar_pci_write_reg(pcie->base, rcar_pci_read_reg(pcie->base, PCIEERRFR),
> > + PCIEERRFR);
> > +
> > + /* Set the PIO address */
> > + rcar_pci_write_reg(pcie->base, PCIE_CONF_BUS(bus->number) |
> > + PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR);
> > +
> > + /* Enable the configuration access */
> > + if (bus->parent->number == pcie->root_bus_nr)
> > + rcar_pci_write_reg(pcie->base,
> > + CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR);
> > + else
> > + rcar_pci_write_reg(pcie->base,
> > + CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR);
> > +
> > + /* Check for errors */
> > + if (rcar_pci_read_reg(pcie->base, PCIEERRFR) & UNSUPPORTED_REQUEST)
> > + return PCIBIOS_DEVICE_NOT_FOUND;
> > +
> > + /* Check for master and target aborts */
> > + if (rcar_read_conf(pcie, RCONF(PCI_STATUS)) &
> > + (PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT))
> > + return PCIBIOS_DEVICE_NOT_FOUND;
> > +
> > + if (access_type == RCAR_PCI_ACCESS_READ)
> > + *data = rcar_pci_read_reg(pcie->base, PCIECDR);
> > + else
> > + rcar_pci_write_reg(pcie->base, *data, PCIECDR);
> > +
> > + /* Disable the configuration access */
> > + rcar_pci_write_reg(pcie->base, 0, PCIECCTLR);
> > +
> > + return PCIBIOS_SUCCESSFUL;
> > +}
> > +
> > +static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
> > + int where, int size, u32 *val)
> > +{
> > + struct rcar_pcie *pcie = bus->sysdata;
> > + int ret;
> > +
> > + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ,
> > + bus, devfn, where, val);
> > + if (ret != PCIBIOS_SUCCESSFUL) {
> > + *val = 0xffffffff;
> > + return ret;
> > + }
> > +
> > + if (size == 1)
> > + *val = (*val >> (BITS_PER_BYTE * (where & 3))) & 0xff;
> > + else if (size == 2)
> > + *val = (*val >> (BITS_PER_BYTE * (where & 2))) & 0xffff;
> > +
> > + dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n",
> > + bus->number, devfn, where, size, *val);
> > +
> > + return ret;
> > +}
> > +
> > +/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */
> > +static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn,
> > + int where, int size, u32 val)
> > +{
> > + struct rcar_pcie *pcie = bus->sysdata;
> > + unsigned int shift;
> > + u32 data;
> > + int ret;
> > +
> > + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ,
> > + bus, devfn, where, &data);
> > + if (ret != PCIBIOS_SUCCESSFUL)
> > + return ret;
> > +
> > + dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n",
> > + bus->number, devfn, where, size, val);
> > +
> > + if (size == 1) {
> > + shift = BITS_PER_BYTE * (where & 3);
> > + data &= ~(0xff << shift);
> > + data |= ((val & 0xff) << shift);
> > + } else if (size == 2) {
> > + shift = BITS_PER_BYTE * (where & 2);
> > + data &= ~(0xffff << shift);
> > + data |= ((val & 0xffff) << shift);
> > + } else {
> > + data = val;
> > + }
> > +
> > + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_WRITE,
> > + bus, devfn, where, &data);
> > +
> > + return ret;
> > +}
> > +
> > +static struct pci_ops rcar_pcie_ops = {
> > + .read = rcar_pcie_read_conf,
> > + .write = rcar_pcie_write_conf,
> > +};
> > +
> > +static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci)
> > +{
> > + struct resource_entry *win;
> > + int i = 0;
> > +
> > + /* Setup PCI resources */
> > + resource_list_for_each_entry(win, &pci->resources) {
> > + struct resource *res = win->res;
> > +
> > + if (!res->flags)
> > + continue;
> > +
> > + switch (resource_type(res)) {
> > + case IORESOURCE_IO:
> > + case IORESOURCE_MEM:
> > + rcar_pcie_set_outbound(i, pci->base, res, true);
> > + i++;
> > + break;
> > + case IORESOURCE_BUS:
> > + pci->root_bus_nr = res->start;
> > + break;
> > + default:
> > + continue;
> > + }
> > +
> > + pci_add_resource(resource, res);
> > + }
> > +
> > + return 1;
> > +}
> > +
> > +static void rcar_pcie_force_speedup(struct rcar_pcie *pcie)
> > +{
> > + struct device *dev = pcie->dev;
> > + unsigned int timeout = 1000;
> > + u32 macsr;
> > +
> > + if ((rcar_pci_read_reg(pcie->base, MACS2R) & LINK_SPEED) !=
> > + LINK_SPEED_5_0GTS)
> > + return;
> > +
> > + if (rcar_pci_read_reg(pcie->base, MACCTLR) & SPEED_CHANGE) {
> > + dev_err(dev, "Speed change already in progress\n");
> > + return;
> > + }
> > +
> > + macsr = rcar_pci_read_reg(pcie->base, MACSR);
> > + if ((macsr & LINK_SPEED) == LINK_SPEED_5_0GTS)
> > + goto done;
> > +
> > + /* Set target link speed to 5.0 GT/s */
> > + rcar_rmw32(pcie->base, EXPCAP(12), PCI_EXP_LNKSTA_CLS,
> > + PCI_EXP_LNKSTA_CLS_5_0GB);
> > +
> > + /* Set speed change reason as intentional factor */
> > + rcar_rmw32(pcie->base, MACCGSPSETR, SPCNGRSN, 0);
> > +
> > + /* Clear SPCHGFIN, SPCHGSUC, and SPCHGFAIL */
> > + if (macsr & (SPCHGFIN | SPCHGSUC | SPCHGFAIL))
> > + rcar_pci_write_reg(pcie->base, macsr, MACSR);
> > +
> > + /* Start link speed change */
> > + rcar_rmw32(pcie->base, MACCTLR, SPEED_CHANGE, SPEED_CHANGE);
> > +
> > + while (timeout--) {
> > + macsr = rcar_pci_read_reg(pcie->base, MACSR);
> > + if (macsr & SPCHGFIN) {
> > + /* Clear the interrupt bits */
> > + rcar_pci_write_reg(pcie->base, macsr, MACSR);
> > +
> > + if (macsr & SPCHGFAIL)
> > + dev_err(dev, "Speed change failed\n");
> > +
> > + goto done;
> > + }
> > +
> > + usleep_range(1000, 2000);
> > + }
> > +
> > + dev_err(dev, "Speed change timed out\n");
> > +
> > +done:
> > + dev_info(dev, "Current link speed is %s GT/s\n",
> > + (macsr & LINK_SPEED) == LINK_SPEED_5_0GTS ? "5" : "2.5");
> > +}
> > +
> > +static int rcar_pcie_enable(struct rcar_pcie *pcie)
> > +{
> > + struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
> > + struct device *dev = pcie->dev;
> > + struct pci_bus *bus, *child;
> > + int ret;
> > +
> > + /* Try setting 5 GT/s link speed */
> > + rcar_pcie_force_speedup(pcie);
> > +
> > + rcar_pcie_setup(&bridge->windows, pcie);
> > +
> > + pci_add_flags(PCI_REASSIGN_ALL_BUS);
> > +
> > + bridge->dev.parent = dev;
> > + bridge->sysdata = pcie;
> > + bridge->busnr = pcie->root_bus_nr;
> > + bridge->ops = &rcar_pcie_ops;
> > + bridge->map_irq = of_irq_parse_and_map_pci;
> > + bridge->swizzle_irq = pci_common_swizzle;
> > + if (IS_ENABLED(CONFIG_PCI_MSI))
> > + bridge->msi = &pcie->msi.chip;
> > +
> > + ret = pci_scan_root_bus_bridge(bridge);
> > + if (ret < 0)
> > + return ret;
> > +
> > + bus = bridge->bus;
> > +
> > + pci_bus_size_bridges(bus);
> > + pci_bus_assign_resources(bus);
> > +
> > + list_for_each_entry(child, &bus->children, node)
> > + pcie_bus_configure_settings(child);
> > +
> > + pci_bus_add_devices(bus);
> > +
> > + return 0;
> > +}
> > +
> > +static int phy_wait_for_ack(struct rcar_pcie *pcie)
> > +{
> > + struct device *dev = pcie->dev;
> > + unsigned int timeout = 100;
> > +
> > + while (timeout--) {
> > + if (rcar_pci_read_reg(pcie->base, H1_PCIEPHYADRR) & PHY_ACK)
> > + return 0;
> > +
> > + usleep_range(90, 110);
> > + }
> > +
> > + dev_err(dev, "Access to PCIe phy timed out\n");
> > +
> > + return -ETIMEDOUT;
> > +}
> > +
> > +static void phy_write_reg(struct rcar_pcie *pcie,
> > + unsigned int rate, u32 addr,
> > + unsigned int lane, u32 data)
> > +{
> > + u32 phyaddr;
> > +
> > + phyaddr = WRITE_CMD |
> > + ((rate & 1) << RATE_POS) |
> > + ((lane & 0xf) << LANE_POS) |
> > + ((addr & 0xff) << ADR_POS);
> > +
> > + /* Set write data */
> > + rcar_pci_write_reg(pcie->base, data, H1_PCIEPHYDOUTR);
> > + rcar_pci_write_reg(pcie->base, phyaddr, H1_PCIEPHYADRR);
> > +
> > + /* Ignore errors as they will be dealt with if the data link is down */
> > + phy_wait_for_ack(pcie);
> > +
> > + /* Clear command */
> > + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYDOUTR);
> > + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYADRR);
> > +
> > + /* Ignore errors as they will be dealt with if the data link is down */
> > + phy_wait_for_ack(pcie);
> > +}
> > +
> > +static int rcar_pcie_hw_init(struct rcar_pcie *pcie)
> > +{
> > + int err;
> > +
> > + /* Begin initialization */
> > + rcar_pci_write_reg(pcie->base, 0, PCIETCTLR);
> > +
> > + /* Set mode */
> > + rcar_pci_write_reg(pcie->base, 1, PCIEMSR);
> > +
> > + err = rcar_pcie_wait_for_phyrdy(pcie->base);
> > + if (err)
> > + return err;
> > +
> > + /*
> > + * Initial header for port config space is type 1, set the device
> > + * class to match. Hardware takes care of propagating the IDSETR
> > + * settings, so there is no need to bother with a quirk.
> > + */
> > + rcar_pci_write_reg(pcie->base, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1);
> > +
> > + /*
> > + * Setup Secondary Bus Number & Subordinate Bus Number, even though
> > + * they aren't used, to avoid bridge being detected as broken.
> > + */
> > + rcar_rmw32(pcie->base, RCONF(PCI_SECONDARY_BUS), 0xff, 1);
> > + rcar_rmw32(pcie->base, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1);
> > +
> > + /* Initialize default capabilities. */
> > + rcar_rmw32(pcie->base, REXPCAP(0), 0xff, PCI_CAP_ID_EXP);
> > + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_FLAGS),
> > + PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4);
> > + rcar_rmw32(pcie->base, RCONF(PCI_HEADER_TYPE), 0x7f,
> > + PCI_HEADER_TYPE_BRIDGE);
> > +
> > + /* Enable data link layer active state reporting */
> > + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC,
> > + PCI_EXP_LNKCAP_DLLLARC);
> > +
> > + /* Write out the physical slot number = 0 */
> > + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0);
> > +
> > + /* Set the completion timer timeout to the maximum 50ms. */
> > + rcar_rmw32(pcie->base, TLCTLR + 1, 0x3f, 50);
> > +
> > + /* Terminate list of capabilities (Next Capability Offset=0) */
> > + rcar_rmw32(pcie->base, RVCCAP(0), 0xfff00000, 0);
> > +
> > + /* Enable MSI */
> > + if (IS_ENABLED(CONFIG_PCI_MSI))
> > + rcar_pci_write_reg(pcie->base, 0x801f0000, PCIEMSITXR);
> > +
> > + rcar_rmw32(pcie->base, MACCTLR, MACCTLR_RESERVED, 0);
> > +
> > + /* Finish initialization - establish a PCI Express link */
> > + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR);
> > +
> > + /* This will timeout if we don't have a link. */
> > + err = rcar_pcie_wait_for_dl(pcie->base);
> > + if (err)
> > + return err;
> > +
> > + /* Enable INTx interrupts */
> > + rcar_rmw32(pcie->base, PCIEINTXR, 0, 0xF << 8);
> > +
> > + /* flush modifications */
> > + wmb();
> > +
> > + return 0;
> > +}
> > +
> > +static int rcar_pcie_phy_init_h1(struct rcar_pcie *pcie)
> > +{
> > + /* Initialize the phy */
> > + phy_write_reg(pcie, 0, 0x42, 0x1, 0x0EC34191);
> > + phy_write_reg(pcie, 1, 0x42, 0x1, 0x0EC34180);
> > + phy_write_reg(pcie, 0, 0x43, 0x1, 0x00210188);
> > + phy_write_reg(pcie, 1, 0x43, 0x1, 0x00210188);
> > + phy_write_reg(pcie, 0, 0x44, 0x1, 0x015C0014);
> > + phy_write_reg(pcie, 1, 0x44, 0x1, 0x015C0014);
> > + phy_write_reg(pcie, 1, 0x4C, 0x1, 0x786174A0);
> > + phy_write_reg(pcie, 1, 0x4D, 0x1, 0x048000BB);
> > + phy_write_reg(pcie, 0, 0x51, 0x1, 0x079EC062);
> > + phy_write_reg(pcie, 0, 0x52, 0x1, 0x20000000);
> > + phy_write_reg(pcie, 1, 0x52, 0x1, 0x20000000);
> > + phy_write_reg(pcie, 1, 0x56, 0x1, 0x00003806);
> > +
> > + phy_write_reg(pcie, 0, 0x60, 0x1, 0x004B03A5);
> > + phy_write_reg(pcie, 0, 0x64, 0x1, 0x3F0F1F0F);
> > + phy_write_reg(pcie, 0, 0x66, 0x1, 0x00008000);
> > +
> > + return 0;
> > +}
> > +
> > +static int rcar_pcie_phy_init_gen2(struct rcar_pcie *pcie)
> > +{
> > + /*
> > + * These settings come from the R-Car Series, 2nd Generation User's
> > + * Manual, section 50.3.1 (2) Initialization of the physical layer.
> > + */
> > + rcar_pci_write_reg(pcie->base, 0x000f0030, GEN2_PCIEPHYADDR);
> > + rcar_pci_write_reg(pcie->base, 0x00381203, GEN2_PCIEPHYDATA);
> > + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL);
> > + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL);
> > +
> > + rcar_pci_write_reg(pcie->base, 0x000f0054, GEN2_PCIEPHYADDR);
> > + /* The following value is for DC connection, no termination resistor */
> > + rcar_pci_write_reg(pcie->base, 0x13802007, GEN2_PCIEPHYDATA);
> > + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL);
> > + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL);
> > +
> > + return 0;
> > +}
> > +
> > +static int rcar_pcie_phy_init_gen3(struct rcar_pcie *pcie)
> > +{
> > + int err;
> > +
> > + err = phy_init(pcie->phy);
> > + if (err)
> > + return err;
> > +
> > + err = phy_power_on(pcie->phy);
> > + if (err)
> > + phy_exit(pcie->phy);
> > +
> > + return err;
> > +}
> > +
> > +static int rcar_msi_alloc(struct rcar_msi *chip)
> > +{
> > + int msi;
> > +
> > + mutex_lock(&chip->lock);
> > +
> > + msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR);
> > + if (msi < INT_PCI_MSI_NR)
> > + set_bit(msi, chip->used);
> > + else
> > + msi = -ENOSPC;
> > +
> > + mutex_unlock(&chip->lock);
> > +
> > + return msi;
> > +}
> > +
> > +static int rcar_msi_alloc_region(struct rcar_msi *chip, int no_irqs)
> > +{
> > + int msi;
> > +
> > + mutex_lock(&chip->lock);
> > + msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR,
> > + order_base_2(no_irqs));
> > + mutex_unlock(&chip->lock);
> > +
> > + return msi;
> > +}
> > +
> > +static void rcar_msi_free(struct rcar_msi *chip, unsigned long irq)
> > +{
> > + mutex_lock(&chip->lock);
> > + clear_bit(irq, chip->used);
> > + mutex_unlock(&chip->lock);
> > +}
> > +
> > +static irqreturn_t rcar_pcie_msi_irq(int irq, void *data)
> > +{
> > + struct rcar_pcie *pcie = data;
> > + struct rcar_msi *msi = &pcie->msi;
> > + struct device *dev = pcie->dev;
> > + unsigned long reg;
> > +
> > + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR);
> > +
> > + /* MSI & INTx share an interrupt - we only handle MSI here */
> > + if (!reg)
> > + return IRQ_NONE;
> > +
> > + while (reg) {
> > + unsigned int index = find_first_bit(®, 32);
> > + unsigned int msi_irq;
> > +
> > + /* clear the interrupt */
> > + rcar_pci_write_reg(pcie->base, 1 << index, PCIEMSIFR);
> > +
> > + msi_irq = irq_find_mapping(msi->domain, index);
> > + if (msi_irq) {
> > + if (test_bit(index, msi->used))
> > + generic_handle_irq(msi_irq);
> > + else
> > + dev_info(dev, "unhandled MSI\n");
> > + } else {
> > + /* Unknown MSI, just clear it */
> > + dev_dbg(dev, "unexpected MSI\n");
> > + }
> > +
> > + /* see if there's any more pending in this vector */
> > + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR);
> > + }
> > +
> > + return IRQ_HANDLED;
> > +}
> > +
> > +static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
> > + struct msi_desc *desc)
> > +{
> > + struct rcar_msi *msi = to_rcar_msi(chip);
> > + struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip);
> > + struct msi_msg msg;
> > + unsigned int irq;
> > + int hwirq;
> > +
> > + hwirq = rcar_msi_alloc(msi);
> > + if (hwirq < 0)
> > + return hwirq;
> > +
> > + irq = irq_find_mapping(msi->domain, hwirq);
> > + if (!irq) {
> > + rcar_msi_free(msi, hwirq);
> > + return -EINVAL;
> > + }
> > +
> > + irq_set_msi_desc(irq, desc);
> > +
> > + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE;
> > + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR);
> > + msg.data = hwirq;
> > +
> > + pci_write_msi_msg(irq, &msg);
> > +
> > + return 0;
> > +}
> > +
> > +static int rcar_msi_setup_irqs(struct msi_controller *chip,
> > + struct pci_dev *pdev, int nvec, int type)
> > +{
> > + struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip);
> > + struct rcar_msi *msi = to_rcar_msi(chip);
> > + struct msi_desc *desc;
> > + struct msi_msg msg;
> > + unsigned int irq;
> > + int hwirq;
> > + int i;
> > +
> > + /* MSI-X interrupts are not supported */
> > + if (type == PCI_CAP_ID_MSIX)
> > + return -EINVAL;
> > +
> > + WARN_ON(!list_is_singular(&pdev->dev.msi_list));
> > + desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
> > +
> > + hwirq = rcar_msi_alloc_region(msi, nvec);
> > + if (hwirq < 0)
> > + return -ENOSPC;
> > +
> > + irq = irq_find_mapping(msi->domain, hwirq);
> > + if (!irq)
> > + return -ENOSPC;
> > +
> > + for (i = 0; i < nvec; i++) {
> > + /*
> > + * irq_create_mapping() called from rcar_pcie_probe() pre-
> > + * allocates descs, so there is no need to allocate descs here.
> > + * We can therefore assume that if irq_find_mapping() above
> > + * returns non-zero, then the descs are also successfully
> > + * allocated.
> > + */
> > + if (irq_set_msi_desc_off(irq, i, desc)) {
> > + /* TODO: clear */
> > + return -EINVAL;
> > + }
> > + }
> > +
> > + desc->nvec_used = nvec;
> > + desc->msi_attrib.multiple = order_base_2(nvec);
> > +
> > + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE;
> > + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR);
> > + msg.data = hwirq;
> > +
> > + pci_write_msi_msg(irq, &msg);
> > +
> > + return 0;
> > +}
> > +
> > +static void rcar_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
> > +{
> > + struct irq_data *d = irq_get_irq_data(irq);
> > + struct rcar_msi *msi = to_rcar_msi(chip);
> > +
> > + rcar_msi_free(msi, d->hwirq);
> > +}
> > +
> > +static struct irq_chip rcar_msi_irq_chip = {
> > + .name = "R-Car PCIe MSI",
> > + .irq_enable = pci_msi_unmask_irq,
> > + .irq_disable = pci_msi_mask_irq,
> > + .irq_mask = pci_msi_mask_irq,
> > + .irq_unmask = pci_msi_unmask_irq,
> > +};
> > +
> > +static int rcar_msi_map(struct irq_domain *domain, unsigned int irq,
> > + irq_hw_number_t hwirq)
> > +{
> > + irq_set_chip_and_handler(irq, &rcar_msi_irq_chip, handle_simple_irq);
> > + irq_set_chip_data(irq, domain->host_data);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct irq_domain_ops msi_domain_ops = {
> > + .map = rcar_msi_map,
> > +};
> > +
> > +static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie)
> > +{
> > + struct rcar_msi *msi = &pcie->msi;
> > + int i, irq;
> > +
> > + for (i = 0; i < INT_PCI_MSI_NR; i++) {
> > + irq = irq_find_mapping(msi->domain, i);
> > + if (irq > 0)
> > + irq_dispose_mapping(irq);
> > + }
> > +
> > + irq_domain_remove(msi->domain);
> > +}
> > +
> > +static int rcar_pcie_enable_msi(struct rcar_pcie *pcie)
> > +{
> > + struct rcar_msi *msi = &pcie->msi;
> > + struct device *dev = pcie->dev;
> > + phys_addr_t base;
> > + int err, i;
> > +
> > + mutex_init(&msi->lock);
> > +
> > + msi->chip.dev = dev;
> > + msi->chip.setup_irq = rcar_msi_setup_irq;
> > + msi->chip.setup_irqs = rcar_msi_setup_irqs;
> > + msi->chip.teardown_irq = rcar_msi_teardown_irq;
> > +
> > + msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR,
> > + &msi_domain_ops, &msi->chip);
> > + if (!msi->domain) {
> > + dev_err(dev, "failed to create IRQ domain\n");
> > + return -ENOMEM;
> > + }
> > +
> > + for (i = 0; i < INT_PCI_MSI_NR; i++)
> > + irq_create_mapping(msi->domain, i);
> > +
> > + /* Two irqs are for MSI, but they are also used for non-MSI irqs */
> > + err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq,
> > + IRQF_SHARED | IRQF_NO_THREAD,
> > + rcar_msi_irq_chip.name, pcie);
> > + if (err < 0) {
> > + dev_err(dev, "failed to request IRQ: %d\n", err);
> > + goto err;
> > + }
> > +
> > + err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq,
> > + IRQF_SHARED | IRQF_NO_THREAD,
> > + rcar_msi_irq_chip.name, pcie);
> > + if (err < 0) {
> > + dev_err(dev, "failed to request IRQ: %d\n", err);
> > + goto err;
> > + }
> > +
> > + /* setup MSI data target */
> > + msi->pages = __get_free_pages(GFP_KERNEL, 0);
> > + if (!msi->pages) {
> > + err = -ENOMEM;
> > + goto err;
> > + }
> > + base = virt_to_phys((void *)msi->pages);
> > +
> > + rcar_pci_write_reg(pcie->base, lower_32_bits(base) | MSIFE, PCIEMSIALR);
> > + rcar_pci_write_reg(pcie->base, upper_32_bits(base), PCIEMSIAUR);
> > +
> > + /* enable all MSI interrupts */
> > + rcar_pci_write_reg(pcie->base, 0xffffffff, PCIEMSIIER);
> > +
> > + return 0;
> > +
> > +err:
> > + rcar_pcie_unmap_msi(pcie);
> > + return err;
> > +}
> > +
> > +static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie)
> > +{
> > + struct rcar_msi *msi = &pcie->msi;
> > +
> > + /* Disable all MSI interrupts */
> > + rcar_pci_write_reg(pcie->base, 0, PCIEMSIIER);
> > +
> > + /* Disable address decoding of the MSI interrupt, MSIFE */
> > + rcar_pci_write_reg(pcie->base, 0, PCIEMSIALR);
> > +
> > + free_pages(msi->pages, 0);
> > +
> > + rcar_pcie_unmap_msi(pcie);
> > +}
> > +
> > +static int rcar_pcie_get_resources(struct rcar_pcie *pcie)
> > +{
> > + struct device *dev = pcie->dev;
> > + struct resource res;
> > + int err, i;
> > +
> > + pcie->phy = devm_phy_optional_get(dev, "pcie");
> > + if (IS_ERR(pcie->phy))
> > + return PTR_ERR(pcie->phy);
> > +
> > + err = of_address_to_resource(dev->of_node, 0, &res);
> > + if (err)
> > + return err;
> > +
> > + pcie->base = devm_ioremap_resource(dev, &res);
> > + if (IS_ERR(pcie->base))
> > + return PTR_ERR(pcie->base);
> > +
> > + pcie->bus_clk = devm_clk_get(dev, "pcie_bus");
> > + if (IS_ERR(pcie->bus_clk)) {
> > + dev_err(dev, "cannot get pcie bus clock\n");
> > + return PTR_ERR(pcie->bus_clk);
> > + }
> > +
> > + i = irq_of_parse_and_map(dev->of_node, 0);
> > + if (!i) {
> > + dev_err(dev, "cannot get platform resources for msi interrupt\n");
> > + err = -ENOENT;
> > + goto err_irq1;
> > + }
> > + pcie->msi.irq1 = i;
> > +
> > + i = irq_of_parse_and_map(dev->of_node, 1);
> > + if (!i) {
> > + dev_err(dev, "cannot get platform resources for msi interrupt\n");
> > + err = -ENOENT;
> > + goto err_irq2;
> > + }
> > + pcie->msi.irq2 = i;
> > +
> > + return 0;
> > +
> > +err_irq2:
> > + irq_dispose_mapping(pcie->msi.irq1);
> > +err_irq1:
> > + return err;
> > +}
> > +
> > +static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie,
> > + struct of_pci_range *range,
> > + int *index)
> > +{
> > + u64 restype = range->flags;
> > + u64 cpu_addr = range->cpu_addr;
> > + u64 cpu_end = range->cpu_addr + range->size;
> > + u64 pci_addr = range->pci_addr;
> > + u32 flags = LAM_64BIT | LAR_ENABLE;
> > + u64 mask;
> > + u64 size;
> > + int idx = *index;
> > +
> > + if (restype & IORESOURCE_PREFETCH)
> > + flags |= LAM_PREFETCH;
> > +
> > + /*
> > + * If the size of the range is larger than the alignment of the start
> > + * address, we have to use multiple entries to perform the mapping.
> > + */
> > + if (cpu_addr > 0) {
> > + unsigned long nr_zeros = __ffs64(cpu_addr);
> > + u64 alignment = 1ULL << nr_zeros;
> > +
> > + size = min(range->size, alignment);
> > + } else {
> > + size = range->size;
> > + }
> > + /* Hardware supports max 4GiB inbound region */
> > + size = min(size, 1ULL << 32);
> > +
> > + mask = roundup_pow_of_two(size) - 1;
> > + mask &= ~0xf;
> > +
> > + while (cpu_addr < cpu_end) {
> > + rcar_pcie_set_inbound(pcie->base, cpu_addr, pci_addr,
> > + mask | flags, idx, true);
> > + pci_addr += size;
> > + cpu_addr += size;
> > + idx += 2;
> > +
> > + if (idx > MAX_NR_INBOUND_MAPS) {
> > + dev_err(pcie->dev, "Failed to map inbound regions!\n");
> > + return -EINVAL;
> > + }
> > + }
> > + *index = idx;
> > +
> > + return 0;
> > +}
> > +
> > +static int rcar_pcie_parse_map_dma_ranges(struct rcar_pcie *pcie,
> > + struct device_node *np)
> > +{
> > + struct of_pci_range_parser parser;
> > + struct of_pci_range range;
> > + int index = 0;
> > + int err;
> > +
> > + if (of_pci_dma_range_parser_init(&parser, np))
> > + return -EINVAL;
> > +
> > + /* Get the dma-ranges from DT */
> > + for_each_of_pci_range(&parser, &range) {
> > + u64 end = range.cpu_addr + range.size - 1;
> > +
> > + dev_dbg(pcie->dev, "0x%08x 0x%016llx..0x%016llx -> 0x%016llx\n",
> > + range.flags, range.cpu_addr, end, range.pci_addr);
> > +
> > + err = rcar_pcie_inbound_ranges(pcie, &range, &index);
> > + if (err)
> > + return err;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static const struct of_device_id rcar_pcie_of_match[] = {
> > + { .compatible = "renesas,pcie-r8a7779",
> > + .data = rcar_pcie_phy_init_h1 },
> > + { .compatible = "renesas,pcie-r8a7790",
> > + .data = rcar_pcie_phy_init_gen2 },
> > + { .compatible = "renesas,pcie-r8a7791",
> > + .data = rcar_pcie_phy_init_gen2 },
> > + { .compatible = "renesas,pcie-rcar-gen2",
> > + .data = rcar_pcie_phy_init_gen2 },
> > + { .compatible = "renesas,pcie-r8a7795",
> > + .data = rcar_pcie_phy_init_gen3 },
> > + { .compatible = "renesas,pcie-rcar-gen3",
> > + .data = rcar_pcie_phy_init_gen3 },
> > + {},
> > +};
> > +
> > +static int rcar_pcie_probe(struct platform_device *pdev)
> > +{
> > + int (*phy_init_fn)(struct rcar_pcie *pcie);
> > + struct device *dev = &pdev->dev;
> > + struct pci_host_bridge *bridge;
> > + struct rcar_pcie *pcie;
> > + u32 data;
> > + int err;
> > +
> > + bridge = pci_alloc_host_bridge(sizeof(*pcie));
> > + if (!bridge)
> > + return -ENOMEM;
> > +
> > + pcie = pci_host_bridge_priv(bridge);
> > +
> > + pcie->dev = dev;
> > + platform_set_drvdata(pdev, pcie);
> > +
> > + err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL);
> > + if (err)
> > + goto err_free_bridge;
> > +
> > + pm_runtime_enable(pcie->dev);
> > + err = pm_runtime_get_sync(pcie->dev);
> > + if (err < 0) {
> > + dev_err(pcie->dev, "pm_runtime_get_sync failed\n");
> > + goto err_pm_disable;
> > + }
> > +
> > + err = rcar_pcie_get_resources(pcie);
> > + if (err < 0) {
> > + dev_err(dev, "failed to request resources: %d\n", err);
> > + goto err_pm_put;
> > + }
> > +
> > + err = clk_prepare_enable(pcie->bus_clk);
> > + if (err) {
> > + dev_err(dev, "failed to enable bus clock: %d\n", err);
> > + goto err_unmap_msi_irqs;
> > + }
> > +
> > + err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node);
> > + if (err)
> > + goto err_clk_disable;
> > +
> > + phy_init_fn = of_device_get_match_data(dev);
> > + err = phy_init_fn(pcie);
> > + if (err) {
> > + dev_err(dev, "failed to init PCIe PHY\n");
> > + goto err_clk_disable;
> > + }
> > +
> > + /* Failure to get a link might just be that no cards are inserted */
> > + if (rcar_pcie_hw_init(pcie)) {
> > + dev_info(dev, "PCIe link down\n");
> > + err = -ENODEV;
> > + goto err_phy_shutdown;
> > + }
> > +
> > + data = rcar_pci_read_reg(pcie->base, MACSR);
> > + dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f);
> > +
> > + if (IS_ENABLED(CONFIG_PCI_MSI)) {
> > + err = rcar_pcie_enable_msi(pcie);
> > + if (err < 0) {
> > + dev_err(dev,
> > + "failed to enable MSI support: %d\n",
> > + err);
> > + goto err_phy_shutdown;
> > + }
> > + }
> > +
> > + err = rcar_pcie_enable(pcie);
> > + if (err)
> > + goto err_msi_teardown;
> > +
> > + return 0;
> > +
> > +err_msi_teardown:
> > + if (IS_ENABLED(CONFIG_PCI_MSI))
> > + rcar_pcie_teardown_msi(pcie);
> > +
> > +err_phy_shutdown:
> > + if (pcie->phy) {
> > + phy_power_off(pcie->phy);
> > + phy_exit(pcie->phy);
> > + }
> > +
> > +err_clk_disable:
> > + clk_disable_unprepare(pcie->bus_clk);
> > +
> > +err_unmap_msi_irqs:
> > + irq_dispose_mapping(pcie->msi.irq2);
> > + irq_dispose_mapping(pcie->msi.irq1);
> > +
> > +err_pm_put:
> > + pm_runtime_put(dev);
> > +
> > +err_pm_disable:
> > + pm_runtime_disable(dev);
> > + pci_free_resource_list(&pcie->resources);
> > +
> > +err_free_bridge:
> > + pci_free_host_bridge(bridge);
> > +
> > + return err;
> > +}
> > +
> > +static int rcar_pcie_resume_noirq(struct device *dev)
> > +{
> > + struct rcar_pcie *pcie = dev_get_drvdata(dev);
> > +
> > + if (rcar_pci_read_reg(pcie->base, PMSR) &&
> > + !(rcar_pci_read_reg(pcie->base, PCIETCTLR) & DL_DOWN))
> > + return 0;
> > +
> > + /* Re-establish the PCIe link */
> > + rcar_rmw32(pcie->base, MACCTLR, MACCTLR_RESERVED, 0);
> > + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR);
> > + return rcar_pcie_wait_for_dl(pcie->base);
> > +}
> > +
> > +static const struct dev_pm_ops rcar_pcie_pm_ops = {
> > + .resume_noirq = rcar_pcie_resume_noirq,
> > +};
> > +
> > +static struct platform_driver rcar_pcie_driver = {
> > + .driver = {
> > + .name = "rcar-pcie",
> > + .of_match_table = rcar_pcie_of_match,
> > + .pm = &rcar_pcie_pm_ops,
> > + .suppress_bind_attrs = true,
> > + },
> > + .probe = rcar_pcie_probe,
> > +};
> > +builtin_platform_driver(rcar_pcie_driver);
> > diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c
> > index e45bb2a7bfa5..1008ae6a896c 100644
> > --- a/drivers/pci/controller/pcie-rcar.c
> > +++ b/drivers/pci/controller/pcie-rcar.c
> > @@ -1,7 +1,7 @@
> > // SPDX-License-Identifier: GPL-2.0
> > /*
> > * PCIe driver for Renesas R-Car SoCs
> > - * Copyright (C) 2014 Renesas Electronics Europe Ltd
> > + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd
> > *
> > * Based on:
> > * arch/sh/drivers/pci/pcie-sh7786.c
> > @@ -11,534 +11,80 @@
> > * Author: Phil Edworthy <phil.edworthy@...esas.com>
> > */
> >
> > -#include <linux/bitops.h>
> > -#include <linux/clk.h>
> > #include <linux/delay.h>
> > -#include <linux/interrupt.h>
> > -#include <linux/irq.h>
> > -#include <linux/irqdomain.h>
> > -#include <linux/kernel.h>
> > -#include <linux/init.h>
> > -#include <linux/msi.h>
> > -#include <linux/of_address.h>
> > -#include <linux/of_irq.h>
> > -#include <linux/of_pci.h>
> > -#include <linux/of_platform.h>
> > #include <linux/pci.h>
> > -#include <linux/phy/phy.h>
> > -#include <linux/platform_device.h>
> > -#include <linux/pm_runtime.h>
> > -#include <linux/slab.h>
> >
> > -#define PCIECAR 0x000010
> > -#define PCIECCTLR 0x000018
> > -#define CONFIG_SEND_ENABLE BIT(31)
> > -#define TYPE0 (0 << 8)
> > -#define TYPE1 BIT(8)
> > -#define PCIECDR 0x000020
> > -#define PCIEMSR 0x000028
> > -#define PCIEINTXR 0x000400
> > -#define PCIEPHYSR 0x0007f0
> > -#define PHYRDY BIT(0)
> > -#define PCIEMSITXR 0x000840
> > +#include "pcie-rcar.h"
> >
> > -/* Transfer control */
> > -#define PCIETCTLR 0x02000
> > -#define DL_DOWN BIT(3)
> > -#define CFINIT BIT(0)
> > -#define PCIETSTR 0x02004
> > -#define DATA_LINK_ACTIVE BIT(0)
> > -#define PCIEERRFR 0x02020
> > -#define UNSUPPORTED_REQUEST BIT(4)
> > -#define PCIEMSIFR 0x02044
> > -#define PCIEMSIALR 0x02048
> > -#define MSIFE BIT(0)
> > -#define PCIEMSIAUR 0x0204c
> > -#define PCIEMSIIER 0x02050
> > -
> > -/* root port address */
> > -#define PCIEPRAR(x) (0x02080 + ((x) * 0x4))
> > -
> > -/* local address reg & mask */
> > -#define PCIELAR(x) (0x02200 + ((x) * 0x20))
> > -#define PCIELAMR(x) (0x02208 + ((x) * 0x20))
> > -#define LAM_PREFETCH BIT(3)
> > -#define LAM_64BIT BIT(2)
> > -#define LAR_ENABLE BIT(1)
> > -
> > -/* PCIe address reg & mask */
> > -#define PCIEPALR(x) (0x03400 + ((x) * 0x20))
> > -#define PCIEPAUR(x) (0x03404 + ((x) * 0x20))
> > -#define PCIEPAMR(x) (0x03408 + ((x) * 0x20))
> > -#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20))
> > -#define PAR_ENABLE BIT(31)
> > -#define IO_SPACE BIT(8)
> > -
> > -/* Configuration */
> > -#define PCICONF(x) (0x010000 + ((x) * 0x4))
> > -#define PMCAP(x) (0x010040 + ((x) * 0x4))
> > -#define EXPCAP(x) (0x010070 + ((x) * 0x4))
> > -#define VCCAP(x) (0x010100 + ((x) * 0x4))
> > -
> > -/* link layer */
> > -#define IDSETR1 0x011004
> > -#define TLCTLR 0x011048
> > -#define MACSR 0x011054
> > -#define SPCHGFIN BIT(4)
> > -#define SPCHGFAIL BIT(6)
> > -#define SPCHGSUC BIT(7)
> > -#define LINK_SPEED (0xf << 16)
> > -#define LINK_SPEED_2_5GTS (1 << 16)
> > -#define LINK_SPEED_5_0GTS (2 << 16)
> > -#define MACCTLR 0x011058
> > -#define MACCTLR_RESERVED BIT(0)
> > -#define SPEED_CHANGE BIT(24)
> > -#define SCRAMBLE_DISABLE BIT(27)
> > -#define PMSR 0x01105c
> > -#define MACS2R 0x011078
> > -#define MACCGSPSETR 0x011084
> > -#define SPCNGRSN BIT(31)
> > -
> > -/* R-Car H1 PHY */
> > -#define H1_PCIEPHYADRR 0x04000c
> > -#define WRITE_CMD BIT(16)
> > -#define PHY_ACK BIT(24)
> > -#define RATE_POS 12
> > -#define LANE_POS 8
> > -#define ADR_POS 0
> > -#define H1_PCIEPHYDOUTR 0x040014
> > -
> > -/* R-Car Gen2 PHY */
> > -#define GEN2_PCIEPHYADDR 0x780
> > -#define GEN2_PCIEPHYDATA 0x784
> > -#define GEN2_PCIEPHYCTRL 0x78c
> > -
> > -#define INT_PCI_MSI_NR 32
> > -
> > -#define RCONF(x) (PCICONF(0) + (x))
> > -#define RPMCAP(x) (PMCAP(0) + (x))
> > -#define REXPCAP(x) (EXPCAP(0) + (x))
> > -#define RVCCAP(x) (VCCAP(0) + (x))
> > -
> > -#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24)
> > -#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19)
> > -#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16)
> > -
> > -#define RCAR_PCI_MAX_RESOURCES 4
> > -#define MAX_NR_INBOUND_MAPS 6
> > -
> > -struct rcar_msi {
> > - DECLARE_BITMAP(used, INT_PCI_MSI_NR);
> > - struct irq_domain *domain;
> > - struct msi_controller chip;
> > - unsigned long pages;
> > - struct mutex lock;
> > - int irq1;
> > - int irq2;
> > -};
> > -
> > -static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip)
> > -{
> > - return container_of(chip, struct rcar_msi, chip);
> > -}
> > -
> > -/* Structure representing the PCIe interface */
> > -struct rcar_pcie {
> > - struct device *dev;
> > - struct phy *phy;
> > - void __iomem *base;
> > - struct list_head resources;
> > - int root_bus_nr;
> > - struct clk *bus_clk;
> > - struct rcar_msi msi;
> > -};
> > -
> > -static void rcar_pci_write_reg(struct rcar_pcie *pcie, u32 val,
> > - unsigned int reg)
> > +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg)
> > {
> > - writel(val, pcie->base + reg);
> > + writel(val, base + reg);
> > }
> >
> > -static u32 rcar_pci_read_reg(struct rcar_pcie *pcie, unsigned int reg)
> > +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg)
> > {
> > - return readl(pcie->base + reg);
> > + return readl(base + reg);
> > }
> >
> > -enum {
> > - RCAR_PCI_ACCESS_READ,
> > - RCAR_PCI_ACCESS_WRITE,
> > -};
> > -
> > -static void rcar_rmw32(struct rcar_pcie *pcie, int where, u32 mask, u32 data)
> > +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data)
> > {
> > unsigned int shift = BITS_PER_BYTE * (where & 3);
> > - u32 val = rcar_pci_read_reg(pcie, where & ~3);
> > + u32 val = rcar_pci_read_reg(base, where & ~3);
> >
> > val &= ~(mask << shift);
> > val |= data << shift;
> > - rcar_pci_write_reg(pcie, val, where & ~3);
> > -}
> > -
> > -static u32 rcar_read_conf(struct rcar_pcie *pcie, int where)
> > -{
> > - unsigned int shift = BITS_PER_BYTE * (where & 3);
> > - u32 val = rcar_pci_read_reg(pcie, where & ~3);
> > -
> > - return val >> shift;
> > + rcar_pci_write_reg(base, val, where & ~3);
> > }
> >
> > -/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */
> > -static int rcar_pcie_config_access(struct rcar_pcie *pcie,
> > - unsigned char access_type, struct pci_bus *bus,
> > - unsigned int devfn, int where, u32 *data)
> > -{
> > - unsigned int dev, func, reg, index;
> > -
> > - dev = PCI_SLOT(devfn);
> > - func = PCI_FUNC(devfn);
> > - reg = where & ~3;
> > - index = reg / 4;
> > -
> > - /*
> > - * While each channel has its own memory-mapped extended config
> > - * space, it's generally only accessible when in endpoint mode.
> > - * When in root complex mode, the controller is unable to target
> > - * itself with either type 0 or type 1 accesses, and indeed, any
> > - * controller initiated target transfer to its own config space
> > - * result in a completer abort.
> > - *
> > - * Each channel effectively only supports a single device, but as
> > - * the same channel <-> device access works for any PCI_SLOT()
> > - * value, we cheat a bit here and bind the controller's config
> > - * space to devfn 0 in order to enable self-enumeration. In this
> > - * case the regular ECAR/ECDR path is sidelined and the mangled
> > - * config access itself is initiated as an internal bus transaction.
> > - */
> > - if (pci_is_root_bus(bus)) {
> > - if (dev != 0)
> > - return PCIBIOS_DEVICE_NOT_FOUND;
> > -
> > - if (access_type == RCAR_PCI_ACCESS_READ) {
> > - *data = rcar_pci_read_reg(pcie, PCICONF(index));
> > - } else {
> > - /* Keep an eye out for changes to the root bus number */
> > - if (pci_is_root_bus(bus) && (reg == PCI_PRIMARY_BUS))
> > - pcie->root_bus_nr = *data & 0xff;
> > -
> > - rcar_pci_write_reg(pcie, *data, PCICONF(index));
> > - }
> > -
> > - return PCIBIOS_SUCCESSFUL;
> > - }
> > -
> > - if (pcie->root_bus_nr < 0)
> > - return PCIBIOS_DEVICE_NOT_FOUND;
> > -
> > - /* Clear errors */
> > - rcar_pci_write_reg(pcie, rcar_pci_read_reg(pcie, PCIEERRFR), PCIEERRFR);
> > -
> > - /* Set the PIO address */
> > - rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) |
> > - PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR);
> > -
> > - /* Enable the configuration access */
> > - if (bus->parent->number == pcie->root_bus_nr)
> > - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR);
> > - else
> > - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR);
> > -
> > - /* Check for errors */
> > - if (rcar_pci_read_reg(pcie, PCIEERRFR) & UNSUPPORTED_REQUEST)
> > - return PCIBIOS_DEVICE_NOT_FOUND;
> > -
> > - /* Check for master and target aborts */
> > - if (rcar_read_conf(pcie, RCONF(PCI_STATUS)) &
> > - (PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT))
> > - return PCIBIOS_DEVICE_NOT_FOUND;
> > -
> > - if (access_type == RCAR_PCI_ACCESS_READ)
> > - *data = rcar_pci_read_reg(pcie, PCIECDR);
> > - else
> > - rcar_pci_write_reg(pcie, *data, PCIECDR);
> > -
> > - /* Disable the configuration access */
> > - rcar_pci_write_reg(pcie, 0, PCIECCTLR);
> > -
> > - return PCIBIOS_SUCCESSFUL;
> > -}
> > -
> > -static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
> > - int where, int size, u32 *val)
> > -{
> > - struct rcar_pcie *pcie = bus->sysdata;
> > - int ret;
> > -
> > - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ,
> > - bus, devfn, where, val);
> > - if (ret != PCIBIOS_SUCCESSFUL) {
> > - *val = 0xffffffff;
> > - return ret;
> > - }
> > -
> > - if (size == 1)
> > - *val = (*val >> (BITS_PER_BYTE * (where & 3))) & 0xff;
> > - else if (size == 2)
> > - *val = (*val >> (BITS_PER_BYTE * (where & 2))) & 0xffff;
> > -
> > - dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n",
> > - bus->number, devfn, where, size, *val);
> > -
> > - return ret;
> > -}
> > -
> > -/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */
> > -static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn,
> > - int where, int size, u32 val)
> > -{
> > - struct rcar_pcie *pcie = bus->sysdata;
> > - unsigned int shift;
> > - u32 data;
> > - int ret;
> > -
> > - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ,
> > - bus, devfn, where, &data);
> > - if (ret != PCIBIOS_SUCCESSFUL)
> > - return ret;
> > -
> > - dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n",
> > - bus->number, devfn, where, size, val);
> > -
> > - if (size == 1) {
> > - shift = BITS_PER_BYTE * (where & 3);
> > - data &= ~(0xff << shift);
> > - data |= ((val & 0xff) << shift);
> > - } else if (size == 2) {
> > - shift = BITS_PER_BYTE * (where & 2);
> > - data &= ~(0xffff << shift);
> > - data |= ((val & 0xffff) << shift);
> > - } else
> > - data = val;
> > -
> > - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_WRITE,
> > - bus, devfn, where, &data);
> > -
> > - return ret;
> > -}
> > -
> > -static struct pci_ops rcar_pcie_ops = {
> > - .read = rcar_pcie_read_conf,
> > - .write = rcar_pcie_write_conf,
> > -};
> > -
> > -static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie,
> > - struct resource *res)
> > +void rcar_pcie_set_outbound(int win, void __iomem *base,
> > + struct resource *res, bool host)
> > {
> > /* Setup PCIe address space mappings for each resource */
> > - resource_size_t size;
> > - resource_size_t res_start;
> > - u32 mask;
> > -
> > - rcar_pci_write_reg(pcie, 0x00000000, PCIEPTCTLR(win));
> > + resource_size_t size = 0;
> > + resource_size_t res_start = 0;
> > + u32 mask = 0x0;
> >
> > + rcar_pci_write_reg(base, mask, PCIEPTCTLR(win));
> > /*
> > * The PAMR mask is calculated in units of 128Bytes, which
> > * keeps things pretty simple.
> > */
> > size = resource_size(res);
> > - mask = (roundup_pow_of_two(size) / SZ_128) - 1;
> > - rcar_pci_write_reg(pcie, mask << 7, PCIEPAMR(win));
> > + if (size > 128)
> > + mask = (roundup_pow_of_two(size) / SZ_128) - 1;
> > + rcar_pci_write_reg(base, mask << 7, PCIEPAMR(win));
> >
> > - if (res->flags & IORESOURCE_IO)
> > - res_start = pci_pio_to_address(res->start);
> > - else
> > + if (!host) {
> > res_start = res->start;
> > + } else {
> > + if (res->flags & IORESOURCE_IO)
> > + res_start = pci_pio_to_address(res->start);
> > + else
> > + res_start = res->start;
> > + }
> >
> > - rcar_pci_write_reg(pcie, upper_32_bits(res_start), PCIEPAUR(win));
> > - rcar_pci_write_reg(pcie, lower_32_bits(res_start) & ~0x7F,
> > + rcar_pci_write_reg(base, upper_32_bits(res_start), PCIEPAUR(win));
> > + rcar_pci_write_reg(base, lower_32_bits(res_start) & ~0x7F,
> > PCIEPALR(win));
> >
> > - /* First resource is for IO */
> > - mask = PAR_ENABLE;
> > + mask = 0x0;
> > + if (res->start)
> > + mask = PAR_ENABLE;
> > +
> > if (res->flags & IORESOURCE_IO)
> > mask |= IO_SPACE;
> >
> > - rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win));
> > -}
> > -
> > -static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci)
> > -{
> > - struct resource_entry *win;
> > - int i = 0;
> > -
> > - /* Setup PCI resources */
> > - resource_list_for_each_entry(win, &pci->resources) {
> > - struct resource *res = win->res;
> > -
> > - if (!res->flags)
> > - continue;
> > -
> > - switch (resource_type(res)) {
> > - case IORESOURCE_IO:
> > - case IORESOURCE_MEM:
> > - rcar_pcie_setup_window(i, pci, res);
> > - i++;
> > - break;
> > - case IORESOURCE_BUS:
> > - pci->root_bus_nr = res->start;
> > - break;
> > - default:
> > - continue;
> > - }
> > -
> > - pci_add_resource(resource, res);
> > - }
> > -
> > - return 1;
> > -}
> > -
> > -static void rcar_pcie_force_speedup(struct rcar_pcie *pcie)
> > -{
> > - struct device *dev = pcie->dev;
> > - unsigned int timeout = 1000;
> > - u32 macsr;
> > -
> > - if ((rcar_pci_read_reg(pcie, MACS2R) & LINK_SPEED) != LINK_SPEED_5_0GTS)
> > - return;
> > -
> > - if (rcar_pci_read_reg(pcie, MACCTLR) & SPEED_CHANGE) {
> > - dev_err(dev, "Speed change already in progress\n");
> > - return;
> > - }
> > -
> > - macsr = rcar_pci_read_reg(pcie, MACSR);
> > - if ((macsr & LINK_SPEED) == LINK_SPEED_5_0GTS)
> > - goto done;
> > -
> > - /* Set target link speed to 5.0 GT/s */
> > - rcar_rmw32(pcie, EXPCAP(12), PCI_EXP_LNKSTA_CLS,
> > - PCI_EXP_LNKSTA_CLS_5_0GB);
> > -
> > - /* Set speed change reason as intentional factor */
> > - rcar_rmw32(pcie, MACCGSPSETR, SPCNGRSN, 0);
> > -
> > - /* Clear SPCHGFIN, SPCHGSUC, and SPCHGFAIL */
> > - if (macsr & (SPCHGFIN | SPCHGSUC | SPCHGFAIL))
> > - rcar_pci_write_reg(pcie, macsr, MACSR);
> > -
> > - /* Start link speed change */
> > - rcar_rmw32(pcie, MACCTLR, SPEED_CHANGE, SPEED_CHANGE);
> > -
> > - while (timeout--) {
> > - macsr = rcar_pci_read_reg(pcie, MACSR);
> > - if (macsr & SPCHGFIN) {
> > - /* Clear the interrupt bits */
> > - rcar_pci_write_reg(pcie, macsr, MACSR);
> > -
> > - if (macsr & SPCHGFAIL)
> > - dev_err(dev, "Speed change failed\n");
> > -
> > - goto done;
> > - }
> > -
> > - msleep(1);
> > - }
> > -
> > - dev_err(dev, "Speed change timed out\n");
> > -
> > -done:
> > - dev_info(dev, "Current link speed is %s GT/s\n",
> > - (macsr & LINK_SPEED) == LINK_SPEED_5_0GTS ? "5" : "2.5");
> > -}
> > -
> > -static int rcar_pcie_enable(struct rcar_pcie *pcie)
> > -{
> > - struct device *dev = pcie->dev;
> > - struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
> > - struct pci_bus *bus, *child;
> > - int ret;
> > -
> > - /* Try setting 5 GT/s link speed */
> > - rcar_pcie_force_speedup(pcie);
> > -
> > - rcar_pcie_setup(&bridge->windows, pcie);
> > -
> > - pci_add_flags(PCI_REASSIGN_ALL_BUS);
> > -
> > - bridge->dev.parent = dev;
> > - bridge->sysdata = pcie;
> > - bridge->busnr = pcie->root_bus_nr;
> > - bridge->ops = &rcar_pcie_ops;
> > - bridge->map_irq = of_irq_parse_and_map_pci;
> > - bridge->swizzle_irq = pci_common_swizzle;
> > - if (IS_ENABLED(CONFIG_PCI_MSI))
> > - bridge->msi = &pcie->msi.chip;
> > -
> > - ret = pci_scan_root_bus_bridge(bridge);
> > - if (ret < 0)
> > - return ret;
> > -
> > - bus = bridge->bus;
> > -
> > - pci_bus_size_bridges(bus);
> > - pci_bus_assign_resources(bus);
> > -
> > - list_for_each_entry(child, &bus->children, node)
> > - pcie_bus_configure_settings(child);
> > -
> > - pci_bus_add_devices(bus);
> > -
> > - return 0;
> > -}
> > -
> > -static int phy_wait_for_ack(struct rcar_pcie *pcie)
> > -{
> > - struct device *dev = pcie->dev;
> > - unsigned int timeout = 100;
> > -
> > - while (timeout--) {
> > - if (rcar_pci_read_reg(pcie, H1_PCIEPHYADRR) & PHY_ACK)
> > - return 0;
> > -
> > - udelay(100);
> > - }
> > -
> > - dev_err(dev, "Access to PCIe phy timed out\n");
> > -
> > - return -ETIMEDOUT;
> > -}
> > -
> > -static void phy_write_reg(struct rcar_pcie *pcie,
> > - unsigned int rate, u32 addr,
> > - unsigned int lane, u32 data)
> > -{
> > - u32 phyaddr;
> > -
> > - phyaddr = WRITE_CMD |
> > - ((rate & 1) << RATE_POS) |
> > - ((lane & 0xf) << LANE_POS) |
> > - ((addr & 0xff) << ADR_POS);
> > -
> > - /* Set write data */
> > - rcar_pci_write_reg(pcie, data, H1_PCIEPHYDOUTR);
> > - rcar_pci_write_reg(pcie, phyaddr, H1_PCIEPHYADRR);
> > -
> > - /* Ignore errors as they will be dealt with if the data link is down */
> > - phy_wait_for_ack(pcie);
> > -
> > - /* Clear command */
> > - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYDOUTR);
> > - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYADRR);
> > -
> > - /* Ignore errors as they will be dealt with if the data link is down */
> > - phy_wait_for_ack(pcie);
> > + rcar_pci_write_reg(base, mask, PCIEPTCTLR(win));
> > + /* flush modifications */
> > + wmb();
> > }
> >
> > -static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie)
> > +int rcar_pcie_wait_for_phyrdy(void __iomem *base)
> > {
> > unsigned int timeout = 10;
> >
> > while (timeout--) {
> > - if (rcar_pci_read_reg(pcie, PCIEPHYSR) & PHYRDY)
> > + if (rcar_pci_read_reg(base, PCIEPHYSR) & PHYRDY)
> > return 0;
> >
> > msleep(5);
> > @@ -547,12 +93,12 @@ static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie)
> > return -ETIMEDOUT;
> > }
> >
> > -static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie)
> > +int rcar_pcie_wait_for_dl(void __iomem *base)
> > {
> > unsigned int timeout = 10000;
> >
> > while (timeout--) {
> > - if ((rcar_pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE))
> > + if ((rcar_pci_read_reg(base, PCIETSTR) & DATA_LINK_ACTIVE))
> > return 0;
> >
> > udelay(5);
> > @@ -562,698 +108,27 @@ static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie)
> > return -ETIMEDOUT;
> > }
> >
> > -static int rcar_pcie_hw_init(struct rcar_pcie *pcie)
> > -{
> > - int err;
> > -
> > - /* Begin initialization */
> > - rcar_pci_write_reg(pcie, 0, PCIETCTLR);
> > -
> > - /* Set mode */
> > - rcar_pci_write_reg(pcie, 1, PCIEMSR);
> > -
> > - err = rcar_pcie_wait_for_phyrdy(pcie);
> > - if (err)
> > - return err;
> > -
> > - /*
> > - * Initial header for port config space is type 1, set the device
> > - * class to match. Hardware takes care of propagating the IDSETR
> > - * settings, so there is no need to bother with a quirk.
> > - */
> > - rcar_pci_write_reg(pcie, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1);
> > -
> > - /*
> > - * Setup Secondary Bus Number & Subordinate Bus Number, even though
> > - * they aren't used, to avoid bridge being detected as broken.
> > - */
> > - rcar_rmw32(pcie, RCONF(PCI_SECONDARY_BUS), 0xff, 1);
> > - rcar_rmw32(pcie, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1);
> > -
> > - /* Initialize default capabilities. */
> > - rcar_rmw32(pcie, REXPCAP(0), 0xff, PCI_CAP_ID_EXP);
> > - rcar_rmw32(pcie, REXPCAP(PCI_EXP_FLAGS),
> > - PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4);
> > - rcar_rmw32(pcie, RCONF(PCI_HEADER_TYPE), 0x7f,
> > - PCI_HEADER_TYPE_BRIDGE);
> > -
> > - /* Enable data link layer active state reporting */
> > - rcar_rmw32(pcie, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC,
> > - PCI_EXP_LNKCAP_DLLLARC);
> > -
> > - /* Write out the physical slot number = 0 */
> > - rcar_rmw32(pcie, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0);
> > -
> > - /* Set the completion timer timeout to the maximum 50ms. */
> > - rcar_rmw32(pcie, TLCTLR + 1, 0x3f, 50);
> > -
> > - /* Terminate list of capabilities (Next Capability Offset=0) */
> > - rcar_rmw32(pcie, RVCCAP(0), 0xfff00000, 0);
> > -
> > - /* Enable MSI */
> > - if (IS_ENABLED(CONFIG_PCI_MSI))
> > - rcar_pci_write_reg(pcie, 0x801f0000, PCIEMSITXR);
> > -
> > - rcar_rmw32(pcie, MACCTLR, MACCTLR_RESERVED, 0);
> > -
> > - /* Finish initialization - establish a PCI Express link */
> > - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR);
> > -
> > - /* This will timeout if we don't have a link. */
> > - err = rcar_pcie_wait_for_dl(pcie);
> > - if (err)
> > - return err;
> > -
> > - /* Enable INTx interrupts */
> > - rcar_rmw32(pcie, PCIEINTXR, 0, 0xF << 8);
> > -
> > - wmb();
> > -
> > - return 0;
> > -}
> > -
> > -static int rcar_pcie_phy_init_h1(struct rcar_pcie *pcie)
> > -{
> > - /* Initialize the phy */
> > - phy_write_reg(pcie, 0, 0x42, 0x1, 0x0EC34191);
> > - phy_write_reg(pcie, 1, 0x42, 0x1, 0x0EC34180);
> > - phy_write_reg(pcie, 0, 0x43, 0x1, 0x00210188);
> > - phy_write_reg(pcie, 1, 0x43, 0x1, 0x00210188);
> > - phy_write_reg(pcie, 0, 0x44, 0x1, 0x015C0014);
> > - phy_write_reg(pcie, 1, 0x44, 0x1, 0x015C0014);
> > - phy_write_reg(pcie, 1, 0x4C, 0x1, 0x786174A0);
> > - phy_write_reg(pcie, 1, 0x4D, 0x1, 0x048000BB);
> > - phy_write_reg(pcie, 0, 0x51, 0x1, 0x079EC062);
> > - phy_write_reg(pcie, 0, 0x52, 0x1, 0x20000000);
> > - phy_write_reg(pcie, 1, 0x52, 0x1, 0x20000000);
> > - phy_write_reg(pcie, 1, 0x56, 0x1, 0x00003806);
> > -
> > - phy_write_reg(pcie, 0, 0x60, 0x1, 0x004B03A5);
> > - phy_write_reg(pcie, 0, 0x64, 0x1, 0x3F0F1F0F);
> > - phy_write_reg(pcie, 0, 0x66, 0x1, 0x00008000);
> > -
> > - return 0;
> > -}
> > -
> > -static int rcar_pcie_phy_init_gen2(struct rcar_pcie *pcie)
> > -{
> > - /*
> > - * These settings come from the R-Car Series, 2nd Generation User's
> > - * Manual, section 50.3.1 (2) Initialization of the physical layer.
> > - */
> > - rcar_pci_write_reg(pcie, 0x000f0030, GEN2_PCIEPHYADDR);
> > - rcar_pci_write_reg(pcie, 0x00381203, GEN2_PCIEPHYDATA);
> > - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL);
> > - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL);
> > -
> > - rcar_pci_write_reg(pcie, 0x000f0054, GEN2_PCIEPHYADDR);
> > - /* The following value is for DC connection, no termination resistor */
> > - rcar_pci_write_reg(pcie, 0x13802007, GEN2_PCIEPHYDATA);
> > - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL);
> > - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL);
> > -
> > - return 0;
> > -}
> > -
> > -static int rcar_pcie_phy_init_gen3(struct rcar_pcie *pcie)
> > -{
> > - int err;
> > -
> > - err = phy_init(pcie->phy);
> > - if (err)
> > - return err;
> > -
> > - err = phy_power_on(pcie->phy);
> > - if (err)
> > - phy_exit(pcie->phy);
> > -
> > - return err;
> > -}
> > -
> > -static int rcar_msi_alloc(struct rcar_msi *chip)
> > -{
> > - int msi;
> > -
> > - mutex_lock(&chip->lock);
> > -
> > - msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR);
> > - if (msi < INT_PCI_MSI_NR)
> > - set_bit(msi, chip->used);
> > - else
> > - msi = -ENOSPC;
> > -
> > - mutex_unlock(&chip->lock);
> > -
> > - return msi;
> > -}
> > -
> > -static int rcar_msi_alloc_region(struct rcar_msi *chip, int no_irqs)
> > -{
> > - int msi;
> > -
> > - mutex_lock(&chip->lock);
> > - msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR,
> > - order_base_2(no_irqs));
> > - mutex_unlock(&chip->lock);
> > -
> > - return msi;
> > -}
> > -
> > -static void rcar_msi_free(struct rcar_msi *chip, unsigned long irq)
> > -{
> > - mutex_lock(&chip->lock);
> > - clear_bit(irq, chip->used);
> > - mutex_unlock(&chip->lock);
> > -}
> > -
> > -static irqreturn_t rcar_pcie_msi_irq(int irq, void *data)
> > -{
> > - struct rcar_pcie *pcie = data;
> > - struct rcar_msi *msi = &pcie->msi;
> > - struct device *dev = pcie->dev;
> > - unsigned long reg;
> > -
> > - reg = rcar_pci_read_reg(pcie, PCIEMSIFR);
> > -
> > - /* MSI & INTx share an interrupt - we only handle MSI here */
> > - if (!reg)
> > - return IRQ_NONE;
> > -
> > - while (reg) {
> > - unsigned int index = find_first_bit(®, 32);
> > - unsigned int msi_irq;
> > -
> > - /* clear the interrupt */
> > - rcar_pci_write_reg(pcie, 1 << index, PCIEMSIFR);
> > -
> > - msi_irq = irq_find_mapping(msi->domain, index);
> > - if (msi_irq) {
> > - if (test_bit(index, msi->used))
> > - generic_handle_irq(msi_irq);
> > - else
> > - dev_info(dev, "unhandled MSI\n");
> > - } else {
> > - /* Unknown MSI, just clear it */
> > - dev_dbg(dev, "unexpected MSI\n");
> > - }
> > -
> > - /* see if there's any more pending in this vector */
> > - reg = rcar_pci_read_reg(pcie, PCIEMSIFR);
> > - }
> > -
> > - return IRQ_HANDLED;
> > -}
> > -
> > -static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
> > - struct msi_desc *desc)
> > -{
> > - struct rcar_msi *msi = to_rcar_msi(chip);
> > - struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip);
> > - struct msi_msg msg;
> > - unsigned int irq;
> > - int hwirq;
> > -
> > - hwirq = rcar_msi_alloc(msi);
> > - if (hwirq < 0)
> > - return hwirq;
> > -
> > - irq = irq_find_mapping(msi->domain, hwirq);
> > - if (!irq) {
> > - rcar_msi_free(msi, hwirq);
> > - return -EINVAL;
> > - }
> > -
> > - irq_set_msi_desc(irq, desc);
> > -
> > - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE;
> > - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR);
> > - msg.data = hwirq;
> > -
> > - pci_write_msi_msg(irq, &msg);
> > -
> > - return 0;
> > -}
> > -
> > -static int rcar_msi_setup_irqs(struct msi_controller *chip,
> > - struct pci_dev *pdev, int nvec, int type)
> > -{
> > - struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip);
> > - struct rcar_msi *msi = to_rcar_msi(chip);
> > - struct msi_desc *desc;
> > - struct msi_msg msg;
> > - unsigned int irq;
> > - int hwirq;
> > - int i;
> > -
> > - /* MSI-X interrupts are not supported */
> > - if (type == PCI_CAP_ID_MSIX)
> > - return -EINVAL;
> > -
> > - WARN_ON(!list_is_singular(&pdev->dev.msi_list));
> > - desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
> > -
> > - hwirq = rcar_msi_alloc_region(msi, nvec);
> > - if (hwirq < 0)
> > - return -ENOSPC;
> > -
> > - irq = irq_find_mapping(msi->domain, hwirq);
> > - if (!irq)
> > - return -ENOSPC;
> > -
> > - for (i = 0; i < nvec; i++) {
> > - /*
> > - * irq_create_mapping() called from rcar_pcie_probe() pre-
> > - * allocates descs, so there is no need to allocate descs here.
> > - * We can therefore assume that if irq_find_mapping() above
> > - * returns non-zero, then the descs are also successfully
> > - * allocated.
> > - */
> > - if (irq_set_msi_desc_off(irq, i, desc)) {
> > - /* TODO: clear */
> > - return -EINVAL;
> > - }
> > - }
> > -
> > - desc->nvec_used = nvec;
> > - desc->msi_attrib.multiple = order_base_2(nvec);
> > -
> > - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE;
> > - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR);
> > - msg.data = hwirq;
> > -
> > - pci_write_msi_msg(irq, &msg);
> > -
> > - return 0;
> > -}
> > -
> > -static void rcar_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
> > -{
> > - struct rcar_msi *msi = to_rcar_msi(chip);
> > - struct irq_data *d = irq_get_irq_data(irq);
> > -
> > - rcar_msi_free(msi, d->hwirq);
> > -}
> > -
> > -static struct irq_chip rcar_msi_irq_chip = {
> > - .name = "R-Car PCIe MSI",
> > - .irq_enable = pci_msi_unmask_irq,
> > - .irq_disable = pci_msi_mask_irq,
> > - .irq_mask = pci_msi_mask_irq,
> > - .irq_unmask = pci_msi_unmask_irq,
> > -};
> > -
> > -static int rcar_msi_map(struct irq_domain *domain, unsigned int irq,
> > - irq_hw_number_t hwirq)
> > -{
> > - irq_set_chip_and_handler(irq, &rcar_msi_irq_chip, handle_simple_irq);
> > - irq_set_chip_data(irq, domain->host_data);
> > -
> > - return 0;
> > -}
> > -
> > -static const struct irq_domain_ops msi_domain_ops = {
> > - .map = rcar_msi_map,
> > -};
> > -
> > -static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie)
> > -{
> > - struct rcar_msi *msi = &pcie->msi;
> > - int i, irq;
> > -
> > - for (i = 0; i < INT_PCI_MSI_NR; i++) {
> > - irq = irq_find_mapping(msi->domain, i);
> > - if (irq > 0)
> > - irq_dispose_mapping(irq);
> > - }
> > -
> > - irq_domain_remove(msi->domain);
> > -}
> > -
> > -static int rcar_pcie_enable_msi(struct rcar_pcie *pcie)
> > -{
> > - struct device *dev = pcie->dev;
> > - struct rcar_msi *msi = &pcie->msi;
> > - phys_addr_t base;
> > - int err, i;
> > -
> > - mutex_init(&msi->lock);
> > -
> > - msi->chip.dev = dev;
> > - msi->chip.setup_irq = rcar_msi_setup_irq;
> > - msi->chip.setup_irqs = rcar_msi_setup_irqs;
> > - msi->chip.teardown_irq = rcar_msi_teardown_irq;
> > -
> > - msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR,
> > - &msi_domain_ops, &msi->chip);
> > - if (!msi->domain) {
> > - dev_err(dev, "failed to create IRQ domain\n");
> > - return -ENOMEM;
> > - }
> > -
> > - for (i = 0; i < INT_PCI_MSI_NR; i++)
> > - irq_create_mapping(msi->domain, i);
> > -
> > - /* Two irqs are for MSI, but they are also used for non-MSI irqs */
> > - err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq,
> > - IRQF_SHARED | IRQF_NO_THREAD,
> > - rcar_msi_irq_chip.name, pcie);
> > - if (err < 0) {
> > - dev_err(dev, "failed to request IRQ: %d\n", err);
> > - goto err;
> > - }
> > -
> > - err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq,
> > - IRQF_SHARED | IRQF_NO_THREAD,
> > - rcar_msi_irq_chip.name, pcie);
> > - if (err < 0) {
> > - dev_err(dev, "failed to request IRQ: %d\n", err);
> > - goto err;
> > - }
> > -
> > - /* setup MSI data target */
> > - msi->pages = __get_free_pages(GFP_KERNEL, 0);
> > - if (!msi->pages) {
> > - err = -ENOMEM;
> > - goto err;
> > - }
> > - base = virt_to_phys((void *)msi->pages);
> > -
> > - rcar_pci_write_reg(pcie, lower_32_bits(base) | MSIFE, PCIEMSIALR);
> > - rcar_pci_write_reg(pcie, upper_32_bits(base), PCIEMSIAUR);
> > -
> > - /* enable all MSI interrupts */
> > - rcar_pci_write_reg(pcie, 0xffffffff, PCIEMSIIER);
> > -
> > - return 0;
> > -
> > -err:
> > - rcar_pcie_unmap_msi(pcie);
> > - return err;
> > -}
> > -
> > -static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie)
> > -{
> > - struct rcar_msi *msi = &pcie->msi;
> > -
> > - /* Disable all MSI interrupts */
> > - rcar_pci_write_reg(pcie, 0, PCIEMSIIER);
> > -
> > - /* Disable address decoding of the MSI interrupt, MSIFE */
> > - rcar_pci_write_reg(pcie, 0, PCIEMSIALR);
> > -
> > - free_pages(msi->pages, 0);
> > -
> > - rcar_pcie_unmap_msi(pcie);
> > -}
> > -
> > -static int rcar_pcie_get_resources(struct rcar_pcie *pcie)
> > -{
> > - struct device *dev = pcie->dev;
> > - struct resource res;
> > - int err, i;
> > -
> > - pcie->phy = devm_phy_optional_get(dev, "pcie");
> > - if (IS_ERR(pcie->phy))
> > - return PTR_ERR(pcie->phy);
> > -
> > - err = of_address_to_resource(dev->of_node, 0, &res);
> > - if (err)
> > - return err;
> > -
> > - pcie->base = devm_ioremap_resource(dev, &res);
> > - if (IS_ERR(pcie->base))
> > - return PTR_ERR(pcie->base);
> > -
> > - pcie->bus_clk = devm_clk_get(dev, "pcie_bus");
> > - if (IS_ERR(pcie->bus_clk)) {
> > - dev_err(dev, "cannot get pcie bus clock\n");
> > - return PTR_ERR(pcie->bus_clk);
> > - }
> > -
> > - i = irq_of_parse_and_map(dev->of_node, 0);
> > - if (!i) {
> > - dev_err(dev, "cannot get platform resources for msi interrupt\n");
> > - err = -ENOENT;
> > - goto err_irq1;
> > - }
> > - pcie->msi.irq1 = i;
> > -
> > - i = irq_of_parse_and_map(dev->of_node, 1);
> > - if (!i) {
> > - dev_err(dev, "cannot get platform resources for msi interrupt\n");
> > - err = -ENOENT;
> > - goto err_irq2;
> > - }
> > - pcie->msi.irq2 = i;
> > -
> > - return 0;
> > -
> > -err_irq2:
> > - irq_dispose_mapping(pcie->msi.irq1);
> > -err_irq1:
> > - return err;
> > -}
> > -
> > -static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie,
> > - struct of_pci_range *range,
> > - int *index)
> > +void rcar_pcie_set_inbound(void __iomem *base,
> > + u64 cpu_addr, u64 pci_addr,
> > + u64 mask, int idx, bool host)
> > {
> > - u64 restype = range->flags;
> > - u64 cpu_addr = range->cpu_addr;
> > - u64 cpu_end = range->cpu_addr + range->size;
> > - u64 pci_addr = range->pci_addr;
> > - u32 flags = LAM_64BIT | LAR_ENABLE;
> > - u64 mask;
> > - u64 size;
> > - int idx = *index;
> > -
> > - if (restype & IORESOURCE_PREFETCH)
> > - flags |= LAM_PREFETCH;
> > -
> > /*
> > - * If the size of the range is larger than the alignment of the start
> > - * address, we have to use multiple entries to perform the mapping.
> > - */
> > - if (cpu_addr > 0) {
> > - unsigned long nr_zeros = __ffs64(cpu_addr);
> > - u64 alignment = 1ULL << nr_zeros;
> > -
> > - size = min(range->size, alignment);
> > - } else {
> > - size = range->size;
> > - }
> > - /* Hardware supports max 4GiB inbound region */
> > - size = min(size, 1ULL << 32);
> > -
> > - mask = roundup_pow_of_two(size) - 1;
> > - mask &= ~0xf;
> > -
> > - while (cpu_addr < cpu_end) {
> > - /*
> > - * Set up 64-bit inbound regions as the range parser doesn't
> > - * distinguish between 32 and 64-bit types.
> > - */
> > - rcar_pci_write_reg(pcie, lower_32_bits(pci_addr),
> > + * Set up 64-bit inbound regions as the range parser doesn't
> > + * distinguish between 32 and 64-bit types.
> > + */
> > + if (host) {
> > + rcar_pci_write_reg(base, lower_32_bits(pci_addr),
> > PCIEPRAR(idx));
> > - rcar_pci_write_reg(pcie, lower_32_bits(cpu_addr), PCIELAR(idx));
> > - rcar_pci_write_reg(pcie, lower_32_bits(mask) | flags,
> > - PCIELAMR(idx));
> > -
> > - rcar_pci_write_reg(pcie, upper_32_bits(pci_addr),
> > + rcar_pci_write_reg(base, upper_32_bits(pci_addr),
> > PCIEPRAR(idx + 1));
> > - rcar_pci_write_reg(pcie, upper_32_bits(cpu_addr),
> > - PCIELAR(idx + 1));
> > - rcar_pci_write_reg(pcie, 0, PCIELAMR(idx + 1));
> > -
> > - pci_addr += size;
> > - cpu_addr += size;
> > - idx += 2;
> > -
> > - if (idx > MAX_NR_INBOUND_MAPS) {
> > - dev_err(pcie->dev, "Failed to map inbound regions!\n");
> > - return -EINVAL;
> > - }
> > }
> > - *index = idx;
> > -
> > - return 0;
> > -}
> >
> > -static int rcar_pcie_parse_map_dma_ranges(struct rcar_pcie *pcie,
> > - struct device_node *np)
> > -{
> > - struct of_pci_range range;
> > - struct of_pci_range_parser parser;
> > - int index = 0;
> > - int err;
> > -
> > - if (of_pci_dma_range_parser_init(&parser, np))
> > - return -EINVAL;
> > -
> > - /* Get the dma-ranges from DT */
> > - for_each_of_pci_range(&parser, &range) {
> > - u64 end = range.cpu_addr + range.size - 1;
> > + rcar_pci_write_reg(base, lower_32_bits(cpu_addr), PCIELAR(idx));
> > + rcar_pci_write_reg(base, lower_32_bits(mask), PCIELAMR(idx));
> >
> > - dev_dbg(pcie->dev, "0x%08x 0x%016llx..0x%016llx -> 0x%016llx\n",
> > - range.flags, range.cpu_addr, end, range.pci_addr);
> > -
> > - err = rcar_pcie_inbound_ranges(pcie, &range, &index);
> > - if (err)
> > - return err;
> > - }
> > + rcar_pci_write_reg(base, upper_32_bits(cpu_addr), PCIELAR(idx + 1));
> > + rcar_pci_write_reg(base, 0, PCIELAMR(idx + 1));
> >
> > - return 0;
> > -}
> > -
> > -static const struct of_device_id rcar_pcie_of_match[] = {
> > - { .compatible = "renesas,pcie-r8a7779",
> > - .data = rcar_pcie_phy_init_h1 },
> > - { .compatible = "renesas,pcie-r8a7790",
> > - .data = rcar_pcie_phy_init_gen2 },
> > - { .compatible = "renesas,pcie-r8a7791",
> > - .data = rcar_pcie_phy_init_gen2 },
> > - { .compatible = "renesas,pcie-rcar-gen2",
> > - .data = rcar_pcie_phy_init_gen2 },
> > - { .compatible = "renesas,pcie-r8a7795",
> > - .data = rcar_pcie_phy_init_gen3 },
> > - { .compatible = "renesas,pcie-rcar-gen3",
> > - .data = rcar_pcie_phy_init_gen3 },
> > - {},
> > -};
> > -
> > -static int rcar_pcie_probe(struct platform_device *pdev)
> > -{
> > - struct device *dev = &pdev->dev;
> > - struct rcar_pcie *pcie;
> > - u32 data;
> > - int err;
> > - int (*phy_init_fn)(struct rcar_pcie *);
> > - struct pci_host_bridge *bridge;
> > -
> > - bridge = pci_alloc_host_bridge(sizeof(*pcie));
> > - if (!bridge)
> > - return -ENOMEM;
> > -
> > - pcie = pci_host_bridge_priv(bridge);
> > -
> > - pcie->dev = dev;
> > - platform_set_drvdata(pdev, pcie);
> > -
> > - err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL);
> > - if (err)
> > - goto err_free_bridge;
> > -
> > - pm_runtime_enable(pcie->dev);
> > - err = pm_runtime_get_sync(pcie->dev);
> > - if (err < 0) {
> > - dev_err(pcie->dev, "pm_runtime_get_sync failed\n");
> > - goto err_pm_disable;
> > - }
> > -
> > - err = rcar_pcie_get_resources(pcie);
> > - if (err < 0) {
> > - dev_err(dev, "failed to request resources: %d\n", err);
> > - goto err_pm_put;
> > - }
> > -
> > - err = clk_prepare_enable(pcie->bus_clk);
> > - if (err) {
> > - dev_err(dev, "failed to enable bus clock: %d\n", err);
> > - goto err_unmap_msi_irqs;
> > - }
> > -
> > - err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node);
> > - if (err)
> > - goto err_clk_disable;
> > -
> > - phy_init_fn = of_device_get_match_data(dev);
> > - err = phy_init_fn(pcie);
> > - if (err) {
> > - dev_err(dev, "failed to init PCIe PHY\n");
> > - goto err_clk_disable;
> > - }
> > -
> > - /* Failure to get a link might just be that no cards are inserted */
> > - if (rcar_pcie_hw_init(pcie)) {
> > - dev_info(dev, "PCIe link down\n");
> > - err = -ENODEV;
> > - goto err_phy_shutdown;
> > - }
> > -
> > - data = rcar_pci_read_reg(pcie, MACSR);
> > - dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f);
> > -
> > - if (IS_ENABLED(CONFIG_PCI_MSI)) {
> > - err = rcar_pcie_enable_msi(pcie);
> > - if (err < 0) {
> > - dev_err(dev,
> > - "failed to enable MSI support: %d\n",
> > - err);
> > - goto err_phy_shutdown;
> > - }
> > - }
> > -
> > - err = rcar_pcie_enable(pcie);
> > - if (err)
> > - goto err_msi_teardown;
> > -
> > - return 0;
> > -
> > -err_msi_teardown:
> > - if (IS_ENABLED(CONFIG_PCI_MSI))
> > - rcar_pcie_teardown_msi(pcie);
> > -
> > -err_phy_shutdown:
> > - if (pcie->phy) {
> > - phy_power_off(pcie->phy);
> > - phy_exit(pcie->phy);
> > - }
> > -
> > -err_clk_disable:
> > - clk_disable_unprepare(pcie->bus_clk);
> > -
> > -err_unmap_msi_irqs:
> > - irq_dispose_mapping(pcie->msi.irq2);
> > - irq_dispose_mapping(pcie->msi.irq1);
> > -
> > -err_pm_put:
> > - pm_runtime_put(dev);
> > -
> > -err_pm_disable:
> > - pm_runtime_disable(dev);
> > - pci_free_resource_list(&pcie->resources);
> > -
> > -err_free_bridge:
> > - pci_free_host_bridge(bridge);
> > -
> > - return err;
> > -}
> > -
> > -static int rcar_pcie_resume_noirq(struct device *dev)
> > -{
> > - struct rcar_pcie *pcie = dev_get_drvdata(dev);
> > -
> > - if (rcar_pci_read_reg(pcie, PMSR) &&
> > - !(rcar_pci_read_reg(pcie, PCIETCTLR) & DL_DOWN))
> > - return 0;
> > -
> > - /* Re-establish the PCIe link */
> > - rcar_rmw32(pcie, MACCTLR, MACCTLR_RESERVED, 0);
> > - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR);
> > - return rcar_pcie_wait_for_dl(pcie);
> > + /* flush modifications */
> > + wmb();
> > }
> > -
> > -static const struct dev_pm_ops rcar_pcie_pm_ops = {
> > - .resume_noirq = rcar_pcie_resume_noirq,
> > -};
> > -
> > -static struct platform_driver rcar_pcie_driver = {
> > - .driver = {
> > - .name = "rcar-pcie",
> > - .of_match_table = rcar_pcie_of_match,
> > - .pm = &rcar_pcie_pm_ops,
> > - .suppress_bind_attrs = true,
> > - },
> > - .probe = rcar_pcie_probe,
> > -};
> > -builtin_platform_driver(rcar_pcie_driver);
> > diff --git a/drivers/pci/controller/pcie-rcar.h b/drivers/pci/controller/pcie-rcar.h
> > new file mode 100644
> > index 000000000000..502621d4e6ac
> > --- /dev/null
> > +++ b/drivers/pci/controller/pcie-rcar.h
> > @@ -0,0 +1,129 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * PCIe driver for Renesas R-Car SoCs
> > + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd
> > + *
> > + * Author: Phil Edworthy <phil.edworthy@...esas.com>
> > + */
> > +#ifndef _PCIE_RCAR_H
> > +#define _PCIE_RCAR_H
> > +
> > +#define PCIECAR 0x000010
> > +#define PCIECCTLR 0x000018
> > +#define CONFIG_SEND_ENABLE BIT(31)
> > +#define TYPE0 (0 << 8)
> > +#define TYPE1 BIT(8)
> > +#define PCIECDR 0x000020
> > +#define PCIEMSR 0x000028
> > +#define PCIEINTXR 0x000400
> > +#define PCIEPHYSR 0x0007f0
> > +#define PHYRDY BIT(0)
> > +#define PCIEMSITXR 0x000840
> > +
> > +/* Transfer control */
> > +#define PCIETCTLR 0x02000
> > +#define DL_DOWN BIT(3)
> > +#define CFINIT BIT(0)
> > +#define PCIETSTR 0x02004
> > +#define DATA_LINK_ACTIVE BIT(0)
> > +#define PCIEERRFR 0x02020
> > +#define UNSUPPORTED_REQUEST BIT(4)
> > +#define PCIEMSIFR 0x02044
> > +#define PCIEMSIALR 0x02048
> > +#define MSIFE BIT(0)
> > +#define PCIEMSIAUR 0x0204c
> > +#define PCIEMSIIER 0x02050
> > +
> > +/* root port address */
> > +#define PCIEPRAR(x) (0x02080 + ((x) * 0x4))
> > +
> > +/* local address reg & mask */
> > +#define PCIELAR(x) (0x02200 + ((x) * 0x20))
> > +#define PCIELAMR(x) (0x02208 + ((x) * 0x20))
> > +#define LAM_PREFETCH BIT(3)
> > +#define LAM_64BIT BIT(2)
> > +#define LAR_ENABLE BIT(1)
> > +
> > +/* PCIe address reg & mask */
> > +#define PCIEPALR(x) (0x03400 + ((x) * 0x20))
> > +#define PCIEPAUR(x) (0x03404 + ((x) * 0x20))
> > +#define PCIEPAMR(x) (0x03408 + ((x) * 0x20))
> > +#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20))
> > +#define PAR_ENABLE BIT(31)
> > +#define IO_SPACE BIT(8)
> > +
> > +/* Configuration */
> > +#define PCICONF(x) (0x010000 + ((x) * 0x4))
> > +#define PMCAP(x) (0x010040 + ((x) * 0x4))
> > +#define EXPCAP(x) (0x010070 + ((x) * 0x4))
> > +#define VCCAP(x) (0x010100 + ((x) * 0x4))
> > +
> > +/* link layer */
> > +#define IDSETR0 0x011000
> > +#define DEVICE_ID_SHFIT 16
> > +#define IDSETR1 0x011004
> > +#define SUBIDSETR 0x011024
> > +#define TLCTLR 0x011048
> > +#define MACSR 0x011054
> > +#define SPCHGFIN BIT(4)
> > +#define SPCHGFAIL BIT(6)
> > +#define SPCHGSUC BIT(7)
> > +#define LINK_SPEED (0xf << 16)
> > +#define LINK_SPEED_2_5GTS BIT(16)
> > +#define LINK_SPEED_5_0GTS BIT(17)
> > +#define MACCTLR 0x011058
> > +#define MACCTLR_RESERVED BIT(0)
> > +#define SPEED_CHANGE BIT(24)
> > +#define SCRAMBLE_DISABLE BIT(27)
> > +#define PMSR 0x01105c
> > +#define MACS2R 0x011078
> > +#define MACCGSPSETR 0x011084
> > +#define SPCNGRSN BIT(31)
> > +
> > +/* R-Car H1 PHY */
> > +#define H1_PCIEPHYADRR 0x04000c
> > +#define WRITE_CMD BIT(16)
> > +#define PHY_ACK BIT(24)
> > +#define RATE_POS 12
> > +#define LANE_POS 8
> > +#define ADR_POS 0
> > +#define H1_PCIEPHYDOUTR 0x040014
> > +
> > +/* R-Car Gen2 PHY */
> > +#define GEN2_PCIEPHYADDR 0x780
> > +#define GEN2_PCIEPHYDATA 0x784
> > +#define GEN2_PCIEPHYCTRL 0x78c
> > +
> > +#define INT_PCI_MSI_NR 32
> > +
> > +#define RCONF(x) (PCICONF(0) + (x))
> > +#define RPMCAP(x) (PMCAP(0) + (x))
> > +#define REXPCAP(x) (EXPCAP(0) + (x))
> > +#define RVCCAP(x) (VCCAP(0) + (x))
> > +
> > +#define INTDIS_SHIFT BIT(10)
> > +#define ASTINTX_SHIFT BIT(16)
> > +
> > +#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24)
> > +#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19)
> > +#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16)
> > +
> > +#define RCAR_PCI_MAX_RESOURCES 4
> > +#define MAX_NR_INBOUND_MAPS 6
> > +
> > +enum {
> > + RCAR_PCI_ACCESS_READ,
> > + RCAR_PCI_ACCESS_WRITE,
> > +};
> > +
> > +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg);
> > +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg);
> > +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data);
> > +int rcar_pcie_wait_for_phyrdy(void __iomem *base);
> > +int rcar_pcie_wait_for_dl(void __iomem *base);
> > +void rcar_pcie_set_outbound(int win, void __iomem *base,
> > + struct resource *res, bool host);
> > +void rcar_pcie_set_inbound(void __iomem *base, u64 cpu_addr, u64 pci_addr,
> > + u64 mask, int idx, bool host);
> > +
> > +#endif
> >
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