// SPDX-License-Identifier: GPL-2.0
/*
* dwc3 - haps . c - Synopsys HAPS PCI Specific glue layer
*
* Copyright ( C ) 2018 Synopsys , Inc .
*
* Authors : Thinh Nguyen < thinhn @ synopsys . com > ,
* John Youn < johnyoun @ synopsys . com >
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/property.h>
/**
* struct dwc3_haps - Driver private structure
* @ dwc3 : child dwc3 platform_device
* @ pci : our link to PCI bus
*/
struct dwc3_haps {
struct platform_device *dwc3;
struct pci_dev *pci;
};
static const struct property_entry initial_properties[] = {
PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable" ),
PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum" ),
PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk" ),
PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent" ),
{ },
};
static const struct software_node dwc3_haps_swnode = {
.properties = initial_properties,
};
static int dwc3_haps_probe(struct pci_dev *pci,
const struct pci_device_id *id)
{
struct dwc3_haps *dwc;
struct device *dev = &pci->dev;
struct resource res[2 ];
int ret;
ret = pcim_enable_device(pci);
if (ret) {
dev_err(dev, "failed to enable pci device\n" );
return -ENODEV;
}
pci_set_master(pci);
dwc = devm_kzalloc(dev, sizeof (*dwc), GFP_KERNEL);
if (!dwc)
return -ENOMEM;
dwc->dwc3 = platform_device_alloc("dwc3" , PLATFORM_DEVID_AUTO);
if (!dwc->dwc3)
return -ENOMEM;
memset(res, 0 x00, sizeof (struct resource) * ARRAY_SIZE(res));
res[0 ].start = pci_resource_start(pci, 0 );
res[0 ].end = pci_resource_end(pci, 0 );
res[0 ].name = "dwc_usb3" ;
res[0 ].flags = IORESOURCE_MEM;
res[1 ].start = pci->irq;
res[1 ].name = "dwc_usb3" ;
res[1 ].flags = IORESOURCE_IRQ;
ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
if (ret) {
dev_err(dev, "couldn't add resources to dwc3 device\n" );
goto err;
}
dwc->pci = pci;
dwc->dwc3->dev.parent = dev;
ret = device_add_software_node(&dwc->dwc3->dev, &dwc3_haps_swnode);
if (ret)
goto err;
ret = platform_device_add(dwc->dwc3);
if (ret) {
dev_err(dev, "failed to register dwc3 device\n" );
goto err;
}
pci_set_drvdata(pci, dwc);
return 0 ;
err:
device_remove_software_node(&dwc->dwc3->dev);
platform_device_put(dwc->dwc3);
return ret;
}
static void dwc3_haps_remove(struct pci_dev *pci)
{
struct dwc3_haps *dwc = pci_get_drvdata(pci);
device_remove_software_node(&dwc->dwc3->dev);
platform_device_unregister(dwc->dwc3);
}
static const struct pci_device_id dwc3_haps_id_table[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
/*
* 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 to prevent
* incorrect driver matching .
*/
.class = (PCI_CLASS_SERIAL_USB << 8 ),
.class_mask = 0 xffff00,
},
{
PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
},
{
PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
},
{ } /* Terminating Entry */
};
MODULE_DEVICE_TABLE(pci, dwc3_haps_id_table);
static struct pci_driver dwc3_haps_driver = {
.name = "dwc3-haps" ,
.id_table = dwc3_haps_id_table,
.probe = dwc3_haps_probe,
.remove = dwc3_haps_remove,
};
MODULE_AUTHOR("Thinh Nguyen <thinhn@synopsys.com>" );
MODULE_LICENSE("GPL v2" );
MODULE_DESCRIPTION("Synopsys HAPS PCI Glue Layer" );
module_pci_driver(dwc3_haps_driver);
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