152 lines
3.7 KiB
C
152 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2015 Broadcom Corporation
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*/
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/clk.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/of_address.h>
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#include <linux/of_pci.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/phy/phy.h>
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#include "../pci.h"
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#include "pcie-iproc.h"
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static const struct of_device_id iproc_pcie_of_match_table[] = {
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{
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.compatible = "brcm,iproc-pcie",
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.data = (int *)IPROC_PCIE_PAXB,
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}, {
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.compatible = "brcm,iproc-pcie-paxb-v2",
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.data = (int *)IPROC_PCIE_PAXB_V2,
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}, {
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.compatible = "brcm,iproc-pcie-paxc",
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.data = (int *)IPROC_PCIE_PAXC,
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}, {
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.compatible = "brcm,iproc-pcie-paxc-v2",
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.data = (int *)IPROC_PCIE_PAXC_V2,
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},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
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static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct iproc_pcie *pcie;
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struct device_node *np = dev->of_node;
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struct resource reg;
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struct pci_host_bridge *bridge;
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int ret;
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bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
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if (!bridge)
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return -ENOMEM;
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pcie = pci_host_bridge_priv(bridge);
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pcie->dev = dev;
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pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
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ret = of_address_to_resource(np, 0, ®);
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if (ret < 0) {
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dev_err(dev, "unable to obtain controller resources\n");
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return ret;
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}
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pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
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resource_size(®));
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if (!pcie->base) {
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dev_err(dev, "unable to map controller registers\n");
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return -ENOMEM;
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}
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pcie->base_addr = reg.start;
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if (of_property_read_bool(np, "brcm,pcie-ob")) {
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u32 val;
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ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
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&val);
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if (ret) {
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dev_err(dev,
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"missing brcm,pcie-ob-axi-offset property\n");
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return ret;
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}
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pcie->ob.axi_offset = val;
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pcie->need_ob_cfg = true;
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}
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/*
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* DT nodes are not used by all platforms that use the iProc PCIe
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* core driver. For platforms that require explicit inbound mapping
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* configuration, "dma-ranges" would have been present in DT
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*/
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pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
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/* PHY use is optional */
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pcie->phy = devm_phy_optional_get(dev, "pcie-phy");
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if (IS_ERR(pcie->phy))
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return PTR_ERR(pcie->phy);
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ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
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&bridge->dma_ranges, NULL);
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if (ret) {
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dev_err(dev, "unable to get PCI host bridge resources\n");
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return ret;
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}
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/* PAXC doesn't support legacy IRQs, skip mapping */
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switch (pcie->type) {
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case IPROC_PCIE_PAXC:
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case IPROC_PCIE_PAXC_V2:
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break;
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default:
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pcie->map_irq = of_irq_parse_and_map_pci;
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}
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ret = iproc_pcie_setup(pcie, &bridge->windows);
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if (ret) {
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dev_err(dev, "PCIe controller setup failed\n");
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return ret;
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}
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platform_set_drvdata(pdev, pcie);
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return 0;
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}
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static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
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{
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struct iproc_pcie *pcie = platform_get_drvdata(pdev);
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return iproc_pcie_remove(pcie);
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}
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static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev)
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{
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struct iproc_pcie *pcie = platform_get_drvdata(pdev);
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iproc_pcie_shutdown(pcie);
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}
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static struct platform_driver iproc_pcie_pltfm_driver = {
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.driver = {
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.name = "iproc-pcie",
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.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
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},
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.probe = iproc_pcie_pltfm_probe,
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.remove = iproc_pcie_pltfm_remove,
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.shutdown = iproc_pcie_pltfm_shutdown,
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};
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module_platform_driver(iproc_pcie_pltfm_driver);
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MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
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MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
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MODULE_LICENSE("GPL v2");
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