PCI: mediatek: Add loadable kernel module support (031337ac) · Commits · 戴 / test

drivers/pci/controller/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -231,7 +231,7 @@ config PCIE_ROCKCHIP_EP
		available to support GEN2 with 4 slots.

		config PCIE_MEDIATEK
		bool "MediaTek PCIe controller"
		tristate "MediaTek PCIe controller"
		depends on ARCH_MEDIATEK \|\| COMPILE_TEST
		depends on OF
		depends on PCI_MSI_IRQ_DOMAIN

drivers/pci/controller/pcie-mediatek.c

+56 −4

Original line number	Diff line number	Diff line
		@@ -15,6 +15,7 @@
		#include <linux/irqdomain.h>
		#include <linux/kernel.h>
		#include <linux/msi.h>
		#include <linux/module.h>
		#include <linux/of_address.h>
		#include <linux/of_pci.h>
		#include <linux/of_platform.h>
		@@ -162,6 +163,7 @@ struct mtk_pcie_soc {
		* @phy: pointer to PHY control block
		* @lane: lane count
		* @slot: port slot
		* @irq: GIC irq
		* @irq_domain: legacy INTx IRQ domain
		* @inner_domain: inner IRQ domain
		* @msi_domain: MSI IRQ domain
		@@ -182,6 +184,7 @@ struct mtk_pcie_port {
		struct phy *phy;
		u32 lane;
		u32 slot;
		int irq;
		struct irq_domain *irq_domain;
		struct irq_domain *inner_domain;
		struct irq_domain *msi_domain;
		@@ -530,6 +533,27 @@ static void mtk_pcie_enable_msi(struct mtk_pcie_port *port)
		writel(val, port->base + PCIE_INT_MASK);
		}

		static void mtk_pcie_irq_teardown(struct mtk_pcie *pcie)
		{
		struct mtk_pcie_port port, tmp;

		list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
		irq_set_chained_handler_and_data(port->irq, NULL, NULL);

		if (port->irq_domain)
		irq_domain_remove(port->irq_domain);

		if (IS_ENABLED(CONFIG_PCI_MSI)) {
		if (port->msi_domain)
		irq_domain_remove(port->msi_domain);
		if (port->inner_domain)
		irq_domain_remove(port->inner_domain);
		}

		irq_dispose_mapping(port->irq);
		}
		}

		static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
		irq_hw_number_t hwirq)
		{
		@@ -620,7 +644,7 @@ static int mtk_pcie_setup_irq(struct mtk_pcie_port *port,
		struct mtk_pcie *pcie = port->pcie;
		struct device *dev = pcie->dev;
		struct platform_device *pdev = to_platform_device(dev);
		int err, irq;
		int err;

		err = mtk_pcie_init_irq_domain(port, node);
		if (err) {
		@@ -628,8 +652,9 @@ static int mtk_pcie_setup_irq(struct mtk_pcie_port *port,
		return err;
		}

		irq = platform_get_irq(pdev, port->slot);
		irq_set_chained_handler_and_data(irq, mtk_pcie_intr_handler, port);
		port->irq = platform_get_irq(pdev, port->slot);
		irq_set_chained_handler_and_data(port->irq,
		mtk_pcie_intr_handler, port);

		return 0;
		}
		@@ -1168,6 +1193,31 @@ put_resources:
		return err;
		}


		static void mtk_pcie_free_resources(struct mtk_pcie *pcie)
		{
		struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
		struct list_head *windows = &host->windows;

		pci_free_resource_list(windows);
		}

		static int mtk_pcie_remove(struct platform_device *pdev)
		{
		struct mtk_pcie *pcie = platform_get_drvdata(pdev);
		struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);

		pci_stop_root_bus(host->bus);
		pci_remove_root_bus(host->bus);
		mtk_pcie_free_resources(pcie);

		mtk_pcie_irq_teardown(pcie);

		mtk_pcie_put_resources(pcie);

		return 0;
		}

		static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev)
		{
		struct mtk_pcie *pcie = dev_get_drvdata(dev);
		@@ -1245,6 +1295,7 @@ static const struct of_device_id mtk_pcie_ids[] = {

		static struct platform_driver mtk_pcie_driver = {
		.probe = mtk_pcie_probe,
		.remove = mtk_pcie_remove,
		.driver = {
		.name = "mtk-pcie",
		.of_match_table = mtk_pcie_ids,
		@@ -1252,4 +1303,5 @@ static struct platform_driver mtk_pcie_driver = {
		.pm = &mtk_pcie_pm_ops,
		},
		};
		builtin_platform_driver(mtk_pcie_driver);
		module_platform_driver(mtk_pcie_driver);
		MODULE_LICENSE("GPL v2");

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