[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 12/17] xen/arm: Add support for Xilinx ZynqMP PCI host controller
From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx> Add support for Xilinx ZynqMP PCI host controller to map the PCI config space to the XEN memory. Patch helps to understand how the generic infrastructure for PCI host-bridge discovery will be used for future references. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx> --- Change on v2: - Add more info in commit msg --- xen/arch/arm/pci/Makefile | 1 + xen/arch/arm/pci/pci-host-zynqmp.c | 58 ++++++++++++++++++++++++++++++ 2 files changed, 59 insertions(+) create mode 100644 xen/arch/arm/pci/pci-host-zynqmp.c diff --git a/xen/arch/arm/pci/Makefile b/xen/arch/arm/pci/Makefile index e86f2b46fd..0572c68bba 100644 --- a/xen/arch/arm/pci/Makefile +++ b/xen/arch/arm/pci/Makefile @@ -4,3 +4,4 @@ obj-y += pci.o obj-y += pci-host-generic.o obj-y += pci-host-common.o obj-y += ecam.o +obj-y += pci-host-zynqmp.o diff --git a/xen/arch/arm/pci/pci-host-zynqmp.c b/xen/arch/arm/pci/pci-host-zynqmp.c new file mode 100644 index 0000000000..c27b4ea9f0 --- /dev/null +++ b/xen/arch/arm/pci/pci-host-zynqmp.c @@ -0,0 +1,58 @@ +/* + * Based on Linux drivers/pci/controller/pci-host-common.c + * Based on Linux drivers/pci/controller/pci-host-generic.c + * Based on xen/arch/arm/pci/pci-host-generic.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <asm/device.h> +#include <xen/pci.h> +#include <asm/pci.h> + +int nwl_cfg_reg_index(struct dt_device_node *np) +{ + return dt_property_match_string(np, "reg-names", "cfg"); +} + +/* ECAM ops */ +const struct pci_ecam_ops nwl_pcie_ops = { + .bus_shift = 20, + .cfg_reg_index = nwl_cfg_reg_index, + .pci_ops = { + .map_bus = pci_ecam_map_bus, + .read = pci_generic_config_read, + .write = pci_generic_config_write, + } +}; + +static const struct dt_device_match nwl_pcie_dt_match[] = { + { .compatible = "xlnx,nwl-pcie-2.11", + .data = &nwl_pcie_ops }, + { }, +}; + +DT_DEVICE_START(pci_gen, "PCI HOST ZYNQMP", DEVICE_PCI) +.dt_match = nwl_pcie_dt_match, +.init = pci_host_common_probe, +DT_DEVICE_END + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ -- 2.17.1
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