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path: root/drivers/pci/controller/dwc/pcie-designware-plat.c
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Diffstat (limited to 'drivers/pci/controller/dwc/pcie-designware-plat.c')
-rw-r--r--drivers/pci/controller/dwc/pcie-designware-plat.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
new file mode 100644
index 0000000000..b625841e98
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PCIe RC driver for Synopsys DesignWare Core
+ *
+ * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Authors: Joao Pinto <Joao.Pinto@synopsys.com>
+ */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/resource.h>
+#include <linux/types.h>
+
+#include "pcie-designware.h"
+
+struct dw_plat_pcie {
+ struct dw_pcie *pci;
+ enum dw_pcie_device_mode mode;
+};
+
+struct dw_plat_pcie_of_data {
+ enum dw_pcie_device_mode mode;
+};
+
+static const struct dw_pcie_host_ops dw_plat_pcie_host_ops = {
+};
+
+static void dw_plat_pcie_ep_init(struct dw_pcie_ep *ep)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ enum pci_barno bar;
+
+ for (bar = 0; bar < PCI_STD_NUM_BARS; bar++)
+ dw_pcie_ep_reset_bar(pci, bar);
+}
+
+static int dw_plat_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
+ enum pci_epc_irq_type type,
+ u16 interrupt_num)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+
+ switch (type) {
+ case PCI_EPC_IRQ_LEGACY:
+ return dw_pcie_ep_raise_legacy_irq(ep, func_no);
+ case PCI_EPC_IRQ_MSI:
+ return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
+ case PCI_EPC_IRQ_MSIX:
+ return dw_pcie_ep_raise_msix_irq(ep, func_no, interrupt_num);
+ default:
+ dev_err(pci->dev, "UNKNOWN IRQ type\n");
+ }
+
+ return 0;
+}
+
+static const struct pci_epc_features dw_plat_pcie_epc_features = {
+ .linkup_notifier = false,
+ .msi_capable = true,
+ .msix_capable = true,
+};
+
+static const struct pci_epc_features*
+dw_plat_pcie_get_features(struct dw_pcie_ep *ep)
+{
+ return &dw_plat_pcie_epc_features;
+}
+
+static const struct dw_pcie_ep_ops pcie_ep_ops = {
+ .ep_init = dw_plat_pcie_ep_init,
+ .raise_irq = dw_plat_pcie_ep_raise_irq,
+ .get_features = dw_plat_pcie_get_features,
+};
+
+static int dw_plat_add_pcie_port(struct dw_plat_pcie *dw_plat_pcie,
+ struct platform_device *pdev)
+{
+ struct dw_pcie *pci = dw_plat_pcie->pci;
+ struct dw_pcie_rp *pp = &pci->pp;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ pp->irq = platform_get_irq(pdev, 1);
+ if (pp->irq < 0)
+ return pp->irq;
+
+ pp->num_vectors = MAX_MSI_IRQS;
+ pp->ops = &dw_plat_pcie_host_ops;
+
+ ret = dw_pcie_host_init(pp);
+ if (ret) {
+ dev_err(dev, "Failed to initialize host\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dw_plat_pcie_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct dw_plat_pcie *dw_plat_pcie;
+ struct dw_pcie *pci;
+ int ret;
+ const struct dw_plat_pcie_of_data *data;
+ enum dw_pcie_device_mode mode;
+
+ data = of_device_get_match_data(dev);
+ if (!data)
+ return -EINVAL;
+
+ mode = (enum dw_pcie_device_mode)data->mode;
+
+ dw_plat_pcie = devm_kzalloc(dev, sizeof(*dw_plat_pcie), GFP_KERNEL);
+ if (!dw_plat_pcie)
+ return -ENOMEM;
+
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+
+ dw_plat_pcie->pci = pci;
+ dw_plat_pcie->mode = mode;
+
+ platform_set_drvdata(pdev, dw_plat_pcie);
+
+ switch (dw_plat_pcie->mode) {
+ case DW_PCIE_RC_TYPE:
+ if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_HOST))
+ return -ENODEV;
+
+ ret = dw_plat_add_pcie_port(dw_plat_pcie, pdev);
+ break;
+ case DW_PCIE_EP_TYPE:
+ if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_EP))
+ return -ENODEV;
+
+ pci->ep.ops = &pcie_ep_ops;
+ ret = dw_pcie_ep_init(&pci->ep);
+ break;
+ default:
+ dev_err(dev, "INVALID device type %d\n", dw_plat_pcie->mode);
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static const struct dw_plat_pcie_of_data dw_plat_pcie_rc_of_data = {
+ .mode = DW_PCIE_RC_TYPE,
+};
+
+static const struct dw_plat_pcie_of_data dw_plat_pcie_ep_of_data = {
+ .mode = DW_PCIE_EP_TYPE,
+};
+
+static const struct of_device_id dw_plat_pcie_of_match[] = {
+ {
+ .compatible = "snps,dw-pcie",
+ .data = &dw_plat_pcie_rc_of_data,
+ },
+ {
+ .compatible = "snps,dw-pcie-ep",
+ .data = &dw_plat_pcie_ep_of_data,
+ },
+ {},
+};
+
+static struct platform_driver dw_plat_pcie_driver = {
+ .driver = {
+ .name = "dw-pcie",
+ .of_match_table = dw_plat_pcie_of_match,
+ .suppress_bind_attrs = true,
+ },
+ .probe = dw_plat_pcie_probe,
+};
+builtin_platform_driver(dw_plat_pcie_driver);