| Message ID | 20230418122403.3178462-21-yoshihiro.shimoda.uh@renesas.com |
|---|---|
| State | New |
| Headers | show |
| Series | PCI: rcar-gen4: Add R-Car Gen4 PCIe support | expand |
On Tue, Apr 18, 2023 at 09:24:01PM +0900, Yoshihiro Shimoda wrote: > Add R-Car Gen4 PCIe Endpoint support. This controller is based on > Synopsys DesignWare PCIe. > > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Small nit below... > --- > drivers/pci/controller/dwc/Kconfig | 9 + > drivers/pci/controller/dwc/Makefile | 2 + > .../pci/controller/dwc/pcie-rcar-gen4-ep.c | 166 ++++++++++++++++++ > 3 files changed, 177 insertions(+) > create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c > > diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig > index eb90e2116e59..1b60cade8a20 100644 > --- a/drivers/pci/controller/dwc/Kconfig > +++ b/drivers/pci/controller/dwc/Kconfig > @@ -424,4 +424,13 @@ config PCIE_RCAR_GEN4 > Say Y here if you want PCIe host controller support on R-Car Gen4 SoCs. > This uses the DesignWare core. > > +config PCIE_RCAR_GEN4_EP > + tristate "Renesas R-Car Gen4 PCIe Endpoint controller" > + depends on ARCH_RENESAS || COMPILE_TEST > + depends on PCI_ENDPOINT > + select PCIE_DW_EP > + help > + Say Y here if you want PCIe endpoint controller support on R-Car Gen4 > + SoCs. This uses the DesignWare core. > + > endmenu > diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile > index 486cf706b53d..0fb0bde26ac4 100644 > --- a/drivers/pci/controller/dwc/Makefile > +++ b/drivers/pci/controller/dwc/Makefile > @@ -28,6 +28,8 @@ obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o > obj-$(CONFIG_PCIE_VISCONTI_HOST) += pcie-visconti.o > pcie-rcar-gen4-host-drv-objs := pcie-rcar-gen4.o pcie-rcar-gen4-host.o > obj-$(CONFIG_PCIE_RCAR_GEN4) += pcie-rcar-gen4-host-drv.o > +pcie-rcar-gen4-ep-drv-objs := pcie-rcar-gen4.o pcie-rcar-gen4-ep.o > +obj-$(CONFIG_PCIE_RCAR_GEN4_EP) += pcie-rcar-gen4-ep-drv.o > > # The following drivers are for devices that use the generic ACPI > # pci_root.c driver but don't support standard ECAM config access. > diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c b/drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c > new file mode 100644 > index 000000000000..eb4b29c948d5 > --- /dev/null > +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c > @@ -0,0 +1,166 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * PCIe Endpoint driver for Renesas R-Car Gen4 Series SoCs > + * Copyright (C) 2022-2023 Renesas Electronics Corporation > + */ > + > +#include <linux/interrupt.h> > +#include <linux/module.h> > +#include <linux/of_device.h> > +#include <linux/pci.h> > +#include <linux/platform_device.h> > + > +#include "pcie-rcar-gen4.h" > +#include "pcie-designware.h" > + > +static void rcar_gen4_pcie_ep_pre_init(struct dw_pcie_ep *ep) > +{ > + struct dw_pcie *dw = to_dw_pcie_from_ep(ep); > + struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); > + u8 val; > + > + rcar_gen4_pcie_set_device_type(rcar, false, dw->num_lanes); > + > + dw_pcie_dbi_ro_wr_en(dw); > + > + /* Single function */ > + val = dw_pcie_readb_dbi(dw, PCI_HEADER_TYPE); > + val &= ~PCI_HEADER_TYPE_MULTI_FUNC; > + dw_pcie_writeb_dbi(dw, PCI_HEADER_TYPE, val); > + > + dw_pcie_dbi_ro_wr_dis(dw); > + > + writel(PCIEDMAINTSTSEN_INIT, rcar->base + PCIEDMAINTSTSEN); > +} > + > +static void rcar_gen4_pcie_ep_deinit(struct dw_pcie_ep *ep) > +{ > + struct dw_pcie *dw = to_dw_pcie_from_ep(ep); > + struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); > + > + writel(0, rcar->base + PCIEDMAINTSTSEN); > +} > + > +static int rcar_gen4_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no, > + enum pci_epc_irq_type type, > + u16 interrupt_num) > +{ > + struct dw_pcie *dw = to_dw_pcie_from_ep(ep); > + > + switch (type) { > + case PCI_EPC_IRQ_INTX: > + return dw_pcie_ep_raise_intx_irq(ep, func_no); > + case PCI_EPC_IRQ_MSI: > + return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num); > + default: > + dev_err(dw->dev, "UNKNOWN IRQ type\n"); Unknown > + return -EINVAL; > + } > + > + return 0; > +} > + > +static const struct pci_epc_features rcar_gen4_pcie_epc_features = { > + .linkup_notifier = false, > + .msi_capable = true, > + .msix_capable = false, > + .reserved_bar = 1 << BAR_5, > + .align = SZ_1M, > +}; > + > +static const struct pci_epc_features* > +rcar_gen4_pcie_ep_get_features(struct dw_pcie_ep *ep) > +{ > + return &rcar_gen4_pcie_epc_features; > +} > + > +static const struct dw_pcie_ep_ops pcie_ep_ops = { > + .ep_pre_init = rcar_gen4_pcie_ep_pre_init, > + .ep_deinit = rcar_gen4_pcie_ep_deinit, > + .raise_irq = rcar_gen4_pcie_ep_raise_irq, > + .get_features = rcar_gen4_pcie_ep_get_features, > +}; > + > +static int rcar_gen4_add_pcie_ep(struct rcar_gen4_pcie *rcar, > + struct platform_device *pdev) > +{ > + struct dw_pcie_ep *ep = &rcar->dw.ep; > + int ret; > + > + ep->ops = &pcie_ep_ops; > + > + ret = dw_pcie_ep_init(ep); > + if (ret) { > + dev_err(&pdev->dev, "failed to initialize endpoint\n"); > + return ret; > + } > + > + return 0; > +} > + > +static void rcar_gen4_remove_pcie_ep(struct rcar_gen4_pcie *rcar) > +{ > + dw_pcie_ep_exit(&rcar->dw.ep); > +} > + > +static int rcar_gen4_pcie_ep_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct rcar_gen4_pcie *rcar; > + int err; > + > + rcar = rcar_gen4_pcie_devm_alloc(dev); > + if (!rcar) > + return -ENOMEM; > + > + err = rcar_gen4_pcie_get_resources(rcar, pdev); > + if (err < 0) { > + dev_err(dev, "Failed to request resource: %d\n", err); > + return err; > + } No need to assert/deassert reset? - Mani
Hi Manivannan, > From: Manivannan Sadhasivam, Sent: Saturday, April 22, 2023 11:47 PM > > On Tue, Apr 18, 2023 at 09:24:01PM +0900, Yoshihiro Shimoda wrote: > > Add R-Car Gen4 PCIe Endpoint support. This controller is based on > > Synopsys DesignWare PCIe. > > > > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> > > Small nit below... > > > --- > > drivers/pci/controller/dwc/Kconfig | 9 + > > drivers/pci/controller/dwc/Makefile | 2 + > > .../pci/controller/dwc/pcie-rcar-gen4-ep.c | 166 ++++++++++++++++++ > > 3 files changed, 177 insertions(+) > > create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c > > > > diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig > > index eb90e2116e59..1b60cade8a20 100644 > > --- a/drivers/pci/controller/dwc/Kconfig > > +++ b/drivers/pci/controller/dwc/Kconfig > > @@ -424,4 +424,13 @@ config PCIE_RCAR_GEN4 > > Say Y here if you want PCIe host controller support on R-Car Gen4 SoCs. > > This uses the DesignWare core. > > > > +config PCIE_RCAR_GEN4_EP > > + tristate "Renesas R-Car Gen4 PCIe Endpoint controller" > > + depends on ARCH_RENESAS || COMPILE_TEST > > + depends on PCI_ENDPOINT > > + select PCIE_DW_EP > > + help > > + Say Y here if you want PCIe endpoint controller support on R-Car Gen4 > > + SoCs. This uses the DesignWare core. > > + > > endmenu > > diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile > > index 486cf706b53d..0fb0bde26ac4 100644 > > --- a/drivers/pci/controller/dwc/Makefile > > +++ b/drivers/pci/controller/dwc/Makefile > > @@ -28,6 +28,8 @@ obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o > > obj-$(CONFIG_PCIE_VISCONTI_HOST) += pcie-visconti.o > > pcie-rcar-gen4-host-drv-objs := pcie-rcar-gen4.o pcie-rcar-gen4-host.o > > obj-$(CONFIG_PCIE_RCAR_GEN4) += pcie-rcar-gen4-host-drv.o > > +pcie-rcar-gen4-ep-drv-objs := pcie-rcar-gen4.o pcie-rcar-gen4-ep.o > > +obj-$(CONFIG_PCIE_RCAR_GEN4_EP) += pcie-rcar-gen4-ep-drv.o > > > > # The following drivers are for devices that use the generic ACPI > > # pci_root.c driver but don't support standard ECAM config access. > > diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c b/drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c > > new file mode 100644 > > index 000000000000..eb4b29c948d5 > > --- /dev/null > > +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c > > @@ -0,0 +1,166 @@ > > +// SPDX-License-Identifier: GPL-2.0-only > > +/* > > + * PCIe Endpoint driver for Renesas R-Car Gen4 Series SoCs > > + * Copyright (C) 2022-2023 Renesas Electronics Corporation > > + */ > > + > > +#include <linux/interrupt.h> > > +#include <linux/module.h> > > +#include <linux/of_device.h> > > +#include <linux/pci.h> > > +#include <linux/platform_device.h> > > + > > +#include "pcie-rcar-gen4.h" > > +#include "pcie-designware.h" > > + > > +static void rcar_gen4_pcie_ep_pre_init(struct dw_pcie_ep *ep) > > +{ > > + struct dw_pcie *dw = to_dw_pcie_from_ep(ep); > > + struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); > > + u8 val; > > + > > + rcar_gen4_pcie_set_device_type(rcar, false, dw->num_lanes); > > + > > + dw_pcie_dbi_ro_wr_en(dw); > > + > > + /* Single function */ > > + val = dw_pcie_readb_dbi(dw, PCI_HEADER_TYPE); > > + val &= ~PCI_HEADER_TYPE_MULTI_FUNC; > > + dw_pcie_writeb_dbi(dw, PCI_HEADER_TYPE, val); > > + > > + dw_pcie_dbi_ro_wr_dis(dw); > > + > > + writel(PCIEDMAINTSTSEN_INIT, rcar->base + PCIEDMAINTSTSEN); > > +} > > + > > +static void rcar_gen4_pcie_ep_deinit(struct dw_pcie_ep *ep) > > +{ > > + struct dw_pcie *dw = to_dw_pcie_from_ep(ep); > > + struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); > > + > > + writel(0, rcar->base + PCIEDMAINTSTSEN); > > +} > > + > > +static int rcar_gen4_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no, > > + enum pci_epc_irq_type type, > > + u16 interrupt_num) > > +{ > > + struct dw_pcie *dw = to_dw_pcie_from_ep(ep); > > + > > + switch (type) { > > + case PCI_EPC_IRQ_INTX: > > + return dw_pcie_ep_raise_intx_irq(ep, func_no); > > + case PCI_EPC_IRQ_MSI: > > + return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num); > > + default: > > + dev_err(dw->dev, "UNKNOWN IRQ type\n"); > > Unknown I got it. I'll fix it on v13. > > + return -EINVAL; > > + } > > + > > + return 0; > > +} > > + > > +static const struct pci_epc_features rcar_gen4_pcie_epc_features = { > > + .linkup_notifier = false, > > + .msi_capable = true, > > + .msix_capable = false, > > + .reserved_bar = 1 << BAR_5, > > + .align = SZ_1M, > > +}; > > + > > +static const struct pci_epc_features* > > +rcar_gen4_pcie_ep_get_features(struct dw_pcie_ep *ep) > > +{ > > + return &rcar_gen4_pcie_epc_features; > > +} > > + > > +static const struct dw_pcie_ep_ops pcie_ep_ops = { > > + .ep_pre_init = rcar_gen4_pcie_ep_pre_init, > > + .ep_deinit = rcar_gen4_pcie_ep_deinit, > > + .raise_irq = rcar_gen4_pcie_ep_raise_irq, > > + .get_features = rcar_gen4_pcie_ep_get_features, > > +}; > > + > > +static int rcar_gen4_add_pcie_ep(struct rcar_gen4_pcie *rcar, > > + struct platform_device *pdev) > > +{ > > + struct dw_pcie_ep *ep = &rcar->dw.ep; > > + int ret; > > + > > + ep->ops = &pcie_ep_ops; > > + > > + ret = dw_pcie_ep_init(ep); > > + if (ret) { > > + dev_err(&pdev->dev, "failed to initialize endpoint\n"); > > + return ret; > > + } > > + > > + return 0; > > +} > > + > > +static void rcar_gen4_remove_pcie_ep(struct rcar_gen4_pcie *rcar) > > +{ > > + dw_pcie_ep_exit(&rcar->dw.ep); > > +} > > + > > +static int rcar_gen4_pcie_ep_probe(struct platform_device *pdev) > > +{ > > + struct device *dev = &pdev->dev; > > + struct rcar_gen4_pcie *rcar; > > + int err; > > + > > + rcar = rcar_gen4_pcie_devm_alloc(dev); > > + if (!rcar) > > + return -ENOMEM; > > + > > + err = rcar_gen4_pcie_get_resources(rcar, pdev); > > + if (err < 0) { > > + dev_err(dev, "Failed to request resource: %d\n", err); > > + return err; > > + } > > No need to assert/deassert reset? I assumed no need to assert reset, and deasserting will be issued on rcar_gen4_pcie_set_device_type() from rcar_gen4_pcie_ep_pre_init(). Best regards, Yoshihiro Shimoda > - Mani > > -- > மணிவண்ணன் சதாசிவம்
diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig index eb90e2116e59..1b60cade8a20 100644 --- a/drivers/pci/controller/dwc/Kconfig +++ b/drivers/pci/controller/dwc/Kconfig @@ -424,4 +424,13 @@ config PCIE_RCAR_GEN4 Say Y here if you want PCIe host controller support on R-Car Gen4 SoCs. This uses the DesignWare core. +config PCIE_RCAR_GEN4_EP + tristate "Renesas R-Car Gen4 PCIe Endpoint controller" + depends on ARCH_RENESAS || COMPILE_TEST + depends on PCI_ENDPOINT + select PCIE_DW_EP + help + Say Y here if you want PCIe endpoint controller support on R-Car Gen4 + SoCs. This uses the DesignWare core. + endmenu diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile index 486cf706b53d..0fb0bde26ac4 100644 --- a/drivers/pci/controller/dwc/Makefile +++ b/drivers/pci/controller/dwc/Makefile @@ -28,6 +28,8 @@ obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o obj-$(CONFIG_PCIE_VISCONTI_HOST) += pcie-visconti.o pcie-rcar-gen4-host-drv-objs := pcie-rcar-gen4.o pcie-rcar-gen4-host.o obj-$(CONFIG_PCIE_RCAR_GEN4) += pcie-rcar-gen4-host-drv.o +pcie-rcar-gen4-ep-drv-objs := pcie-rcar-gen4.o pcie-rcar-gen4-ep.o +obj-$(CONFIG_PCIE_RCAR_GEN4_EP) += pcie-rcar-gen4-ep-drv.o # The following drivers are for devices that use the generic ACPI # pci_root.c driver but don't support standard ECAM config access. diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c b/drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c new file mode 100644 index 000000000000..eb4b29c948d5 --- /dev/null +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c @@ -0,0 +1,166 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PCIe Endpoint driver for Renesas R-Car Gen4 Series SoCs + * Copyright (C) 2022-2023 Renesas Electronics Corporation + */ + +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/pci.h> +#include <linux/platform_device.h> + +#include "pcie-rcar-gen4.h" +#include "pcie-designware.h" + +static void rcar_gen4_pcie_ep_pre_init(struct dw_pcie_ep *ep) +{ + struct dw_pcie *dw = to_dw_pcie_from_ep(ep); + struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); + u8 val; + + rcar_gen4_pcie_set_device_type(rcar, false, dw->num_lanes); + + dw_pcie_dbi_ro_wr_en(dw); + + /* Single function */ + val = dw_pcie_readb_dbi(dw, PCI_HEADER_TYPE); + val &= ~PCI_HEADER_TYPE_MULTI_FUNC; + dw_pcie_writeb_dbi(dw, PCI_HEADER_TYPE, val); + + dw_pcie_dbi_ro_wr_dis(dw); + + writel(PCIEDMAINTSTSEN_INIT, rcar->base + PCIEDMAINTSTSEN); +} + +static void rcar_gen4_pcie_ep_deinit(struct dw_pcie_ep *ep) +{ + struct dw_pcie *dw = to_dw_pcie_from_ep(ep); + struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); + + writel(0, rcar->base + PCIEDMAINTSTSEN); +} + +static int rcar_gen4_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no, + enum pci_epc_irq_type type, + u16 interrupt_num) +{ + struct dw_pcie *dw = to_dw_pcie_from_ep(ep); + + switch (type) { + case PCI_EPC_IRQ_INTX: + return dw_pcie_ep_raise_intx_irq(ep, func_no); + case PCI_EPC_IRQ_MSI: + return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num); + default: + dev_err(dw->dev, "UNKNOWN IRQ type\n"); + return -EINVAL; + } + + return 0; +} + +static const struct pci_epc_features rcar_gen4_pcie_epc_features = { + .linkup_notifier = false, + .msi_capable = true, + .msix_capable = false, + .reserved_bar = 1 << BAR_5, + .align = SZ_1M, +}; + +static const struct pci_epc_features* +rcar_gen4_pcie_ep_get_features(struct dw_pcie_ep *ep) +{ + return &rcar_gen4_pcie_epc_features; +} + +static const struct dw_pcie_ep_ops pcie_ep_ops = { + .ep_pre_init = rcar_gen4_pcie_ep_pre_init, + .ep_deinit = rcar_gen4_pcie_ep_deinit, + .raise_irq = rcar_gen4_pcie_ep_raise_irq, + .get_features = rcar_gen4_pcie_ep_get_features, +}; + +static int rcar_gen4_add_pcie_ep(struct rcar_gen4_pcie *rcar, + struct platform_device *pdev) +{ + struct dw_pcie_ep *ep = &rcar->dw.ep; + int ret; + + ep->ops = &pcie_ep_ops; + + ret = dw_pcie_ep_init(ep); + if (ret) { + dev_err(&pdev->dev, "failed to initialize endpoint\n"); + return ret; + } + + return 0; +} + +static void rcar_gen4_remove_pcie_ep(struct rcar_gen4_pcie *rcar) +{ + dw_pcie_ep_exit(&rcar->dw.ep); +} + +static int rcar_gen4_pcie_ep_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rcar_gen4_pcie *rcar; + int err; + + rcar = rcar_gen4_pcie_devm_alloc(dev); + if (!rcar) + return -ENOMEM; + + err = rcar_gen4_pcie_get_resources(rcar, pdev); + if (err < 0) { + dev_err(dev, "Failed to request resource: %d\n", err); + return err; + } + + platform_set_drvdata(pdev, rcar); + + err = rcar_gen4_pcie_prepare(rcar); + if (err < 0) + return err; + + err = rcar_gen4_add_pcie_ep(rcar, pdev); + if (err < 0) + goto err_add; + + return 0; + +err_add: + rcar_gen4_pcie_unprepare(rcar); + + return err; +} + +static int rcar_gen4_pcie_ep_remove(struct platform_device *pdev) +{ + struct rcar_gen4_pcie *rcar = platform_get_drvdata(pdev); + + rcar_gen4_remove_pcie_ep(rcar); + rcar_gen4_pcie_unprepare(rcar); + + return 0; +} + +static const struct of_device_id rcar_gen4_pcie_of_match[] = { + { .compatible = "renesas,rcar-gen4-pcie-ep", }, + {}, +}; + +static struct platform_driver rcar_gen4_pcie_ep_driver = { + .driver = { + .name = "pcie-rcar-gen4-ep", + .of_match_table = rcar_gen4_pcie_of_match, + }, + .probe = rcar_gen4_pcie_ep_probe, + .remove = rcar_gen4_pcie_ep_remove, +}; +module_platform_driver(rcar_gen4_pcie_ep_driver); + +MODULE_DESCRIPTION("Renesas R-Car Gen4 PCIe endpoint controller driver"); +MODULE_LICENSE("GPL");
Add R-Car Gen4 PCIe Endpoint support. This controller is based on Synopsys DesignWare PCIe. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> --- drivers/pci/controller/dwc/Kconfig | 9 + drivers/pci/controller/dwc/Makefile | 2 + .../pci/controller/dwc/pcie-rcar-gen4-ep.c | 166 ++++++++++++++++++ 3 files changed, 177 insertions(+) create mode 100644 drivers/pci/controller/dwc/pcie-rcar-gen4-ep.c