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i.MX6QP and i.MX7D platform use a PCIe controller with the same VID and PID as this USB controller. The system may incorrectly match this driver to that PCIe controller. To workaround this, specifically use class type USB with PCI device ID to prevent incorrect driver matching. Signed-off-by: Thinh Nguyen <thinhn@synopsys.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/**
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* dwc3-haps.c - Synopsys HAPS PCI Specific glue layer
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*
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* Copyright (C) 2018 Synopsys, Inc.
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*
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* Authors: Thinh Nguyen <thinhn@synopsys.com>,
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* John Youn <johnyoun@synopsys.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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/**
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* struct dwc3_haps - Driver private structure
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* @dwc3: child dwc3 platform_device
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* @pci: our link to PCI bus
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*/
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struct dwc3_haps {
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struct platform_device *dwc3;
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struct pci_dev *pci;
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};
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static const struct property_entry initial_properties[] = {
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PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
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PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
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PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
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PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
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{ },
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};
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static int dwc3_haps_probe(struct pci_dev *pci,
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const struct pci_device_id *id)
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{
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struct dwc3_haps *dwc;
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struct device *dev = &pci->dev;
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struct resource res[2];
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int ret;
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ret = pcim_enable_device(pci);
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if (ret) {
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dev_err(dev, "failed to enable pci device\n");
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return -ENODEV;
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}
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pci_set_master(pci);
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dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
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if (!dwc)
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return -ENOMEM;
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dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
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if (!dwc->dwc3)
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return -ENOMEM;
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memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
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res[0].start = pci_resource_start(pci, 0);
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res[0].end = pci_resource_end(pci, 0);
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res[0].name = "dwc_usb3";
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res[0].flags = IORESOURCE_MEM;
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res[1].start = pci->irq;
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res[1].name = "dwc_usb3";
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res[1].flags = IORESOURCE_IRQ;
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ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
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if (ret) {
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dev_err(dev, "couldn't add resources to dwc3 device\n");
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goto err;
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}
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dwc->pci = pci;
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dwc->dwc3->dev.parent = dev;
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ret = platform_device_add_properties(dwc->dwc3, initial_properties);
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if (ret)
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goto err;
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ret = platform_device_add(dwc->dwc3);
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if (ret) {
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dev_err(dev, "failed to register dwc3 device\n");
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goto err;
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}
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pci_set_drvdata(pci, dwc);
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return 0;
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err:
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platform_device_put(dwc->dwc3);
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return ret;
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}
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static void dwc3_haps_remove(struct pci_dev *pci)
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{
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struct dwc3_haps *dwc = pci_get_drvdata(pci);
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platform_device_unregister(dwc->dwc3);
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}
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static const struct pci_device_id dwc3_haps_id_table[] = {
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
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/*
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* i.MX6QP and i.MX7D platform use a PCIe controller with the
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* same VID and PID as this USB controller. The system may
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* incorrectly match this driver to that PCIe controller. To
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* workaround this, specifically use class type USB to prevent
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* incorrect driver matching.
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*/
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.class = (PCI_CLASS_SERIAL_USB << 8),
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.class_mask = 0xffff00,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
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},
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{ } /* Terminating Entry */
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};
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MODULE_DEVICE_TABLE(pci, dwc3_haps_id_table);
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static struct pci_driver dwc3_haps_driver = {
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.name = "dwc3-haps",
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.id_table = dwc3_haps_id_table,
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.probe = dwc3_haps_probe,
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.remove = dwc3_haps_remove,
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};
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MODULE_AUTHOR("Thinh Nguyen <thinhn@synopsys.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Synopsys HAPS PCI Glue Layer");
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module_pci_driver(dwc3_haps_driver);
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