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![Fan Fei](/assets/img/avatar_default.png)
The designware-plat driver only needs the device data, not the whole struct of_device_id. Use of_device_get_match_data() instead of of_match_device(). No functional change intended. [bhelgaas: commit log] Link: https://lore.kernel.org/r/20211223011054.1227810-5-helgaas@kernel.org Signed-off-by: Fan Fei <ffclaire1224@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Jingoo Han <jingoohan1@gmail.com> Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
200 lines
4.4 KiB
C
200 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* PCIe RC driver for Synopsys DesignWare Core
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*
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* Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
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*
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* Authors: Joao Pinto <Joao.Pinto@synopsys.com>
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/of_device.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/resource.h>
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#include <linux/types.h>
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#include <linux/regmap.h>
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#include "pcie-designware.h"
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struct dw_plat_pcie {
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struct dw_pcie *pci;
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struct regmap *regmap;
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enum dw_pcie_device_mode mode;
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};
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struct dw_plat_pcie_of_data {
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enum dw_pcie_device_mode mode;
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};
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static const struct of_device_id dw_plat_pcie_of_match[];
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static const struct dw_pcie_host_ops dw_plat_pcie_host_ops = {
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};
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static int dw_plat_pcie_establish_link(struct dw_pcie *pci)
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{
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return 0;
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}
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static const struct dw_pcie_ops dw_pcie_ops = {
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.start_link = dw_plat_pcie_establish_link,
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};
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static void dw_plat_pcie_ep_init(struct dw_pcie_ep *ep)
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{
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struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
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enum pci_barno bar;
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for (bar = 0; bar < PCI_STD_NUM_BARS; bar++)
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dw_pcie_ep_reset_bar(pci, bar);
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}
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static int dw_plat_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
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enum pci_epc_irq_type type,
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u16 interrupt_num)
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{
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struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
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switch (type) {
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case PCI_EPC_IRQ_LEGACY:
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return dw_pcie_ep_raise_legacy_irq(ep, func_no);
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case PCI_EPC_IRQ_MSI:
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return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
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case PCI_EPC_IRQ_MSIX:
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return dw_pcie_ep_raise_msix_irq(ep, func_no, interrupt_num);
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default:
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dev_err(pci->dev, "UNKNOWN IRQ type\n");
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}
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return 0;
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}
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static const struct pci_epc_features dw_plat_pcie_epc_features = {
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.linkup_notifier = false,
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.msi_capable = true,
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.msix_capable = true,
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};
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static const struct pci_epc_features*
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dw_plat_pcie_get_features(struct dw_pcie_ep *ep)
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{
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return &dw_plat_pcie_epc_features;
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}
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static const struct dw_pcie_ep_ops pcie_ep_ops = {
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.ep_init = dw_plat_pcie_ep_init,
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.raise_irq = dw_plat_pcie_ep_raise_irq,
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.get_features = dw_plat_pcie_get_features,
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};
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static int dw_plat_add_pcie_port(struct dw_plat_pcie *dw_plat_pcie,
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struct platform_device *pdev)
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{
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struct dw_pcie *pci = dw_plat_pcie->pci;
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struct pcie_port *pp = &pci->pp;
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struct device *dev = &pdev->dev;
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int ret;
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pp->irq = platform_get_irq(pdev, 1);
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if (pp->irq < 0)
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return pp->irq;
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pp->num_vectors = MAX_MSI_IRQS;
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pp->ops = &dw_plat_pcie_host_ops;
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ret = dw_pcie_host_init(pp);
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if (ret) {
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dev_err(dev, "Failed to initialize host\n");
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return ret;
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}
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return 0;
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}
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static int dw_plat_pcie_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct dw_plat_pcie *dw_plat_pcie;
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struct dw_pcie *pci;
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int ret;
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const struct dw_plat_pcie_of_data *data;
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enum dw_pcie_device_mode mode;
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data = of_device_get_match_data(dev);
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if (!data)
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return -EINVAL;
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mode = (enum dw_pcie_device_mode)data->mode;
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dw_plat_pcie = devm_kzalloc(dev, sizeof(*dw_plat_pcie), GFP_KERNEL);
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if (!dw_plat_pcie)
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return -ENOMEM;
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pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
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if (!pci)
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return -ENOMEM;
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pci->dev = dev;
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pci->ops = &dw_pcie_ops;
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dw_plat_pcie->pci = pci;
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dw_plat_pcie->mode = mode;
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platform_set_drvdata(pdev, dw_plat_pcie);
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switch (dw_plat_pcie->mode) {
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case DW_PCIE_RC_TYPE:
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if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_HOST))
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return -ENODEV;
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ret = dw_plat_add_pcie_port(dw_plat_pcie, pdev);
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if (ret < 0)
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return ret;
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break;
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case DW_PCIE_EP_TYPE:
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if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_EP))
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return -ENODEV;
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pci->ep.ops = &pcie_ep_ops;
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return dw_pcie_ep_init(&pci->ep);
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default:
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dev_err(dev, "INVALID device type %d\n", dw_plat_pcie->mode);
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}
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return 0;
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}
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static const struct dw_plat_pcie_of_data dw_plat_pcie_rc_of_data = {
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.mode = DW_PCIE_RC_TYPE,
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};
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static const struct dw_plat_pcie_of_data dw_plat_pcie_ep_of_data = {
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.mode = DW_PCIE_EP_TYPE,
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};
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static const struct of_device_id dw_plat_pcie_of_match[] = {
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{
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.compatible = "snps,dw-pcie",
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.data = &dw_plat_pcie_rc_of_data,
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},
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{
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.compatible = "snps,dw-pcie-ep",
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.data = &dw_plat_pcie_ep_of_data,
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},
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{},
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};
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static struct platform_driver dw_plat_pcie_driver = {
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.driver = {
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.name = "dw-pcie",
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.of_match_table = dw_plat_pcie_of_match,
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.suppress_bind_attrs = true,
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},
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.probe = dw_plat_pcie_probe,
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};
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builtin_platform_driver(dw_plat_pcie_driver);
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