1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
  2/*
  3 * pci.c - DesignWare HS OTG Controller PCI driver
  4 *
  5 * Copyright (C) 2004-2013 Synopsys, Inc.
  6 */
  7
  8/*
  9 * Provides the initialization and cleanup entry points for the DWC_otg PCI
 10 * driver
 11 */
 12#include <linux/kernel.h>
 13#include <linux/module.h>
 14#include <linux/moduleparam.h>
 15#include <linux/spinlock.h>
 16#include <linux/interrupt.h>
 17#include <linux/io.h>
 18#include <linux/slab.h>
 19#include <linux/pci.h>
 20#include <linux/usb.h>
 21
 22#include <linux/usb/hcd.h>
 23#include <linux/usb/ch11.h>
 24#include <linux/platform_device.h>
 25#include <linux/usb/usb_phy_generic.h>
 26
 27#include "core.h"
 28
 29static const char dwc2_driver_name[] = "dwc2-pci";
 30
 31struct dwc2_pci_glue {
 32	struct platform_device *dwc2;
 33	struct platform_device *phy;
 34};
 35
 36/**
 37 * dwc2_pci_remove() - Provides the cleanup entry points for the DWC_otg PCI
 38 * driver
 39 *
 40 * @pci: The programming view of DWC_otg PCI
 41 */
 42static void dwc2_pci_remove(struct pci_dev *pci)
 43{
 44	struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
 45
 46	platform_device_unregister(glue->dwc2);
 47	usb_phy_generic_unregister(glue->phy);
 48	pci_set_drvdata(pci, NULL);
 49}
 50
 51static int dwc2_pci_probe(struct pci_dev *pci,
 52			  const struct pci_device_id *id)
 53{
 54	struct resource		res[2];
 55	struct platform_device	*dwc2;
 56	struct platform_device	*phy;
 57	int			ret;
 58	struct device		*dev = &pci->dev;
 59	struct dwc2_pci_glue	*glue;
 60
 61	ret = pcim_enable_device(pci);
 62	if (ret) {
 63		dev_err(dev, "failed to enable pci device\n");
 64		return -ENODEV;
 65	}
 66
 67	pci_set_master(pci);
 68
 69	phy = usb_phy_generic_register();
 70	if (IS_ERR(phy)) {
 71		dev_err(dev, "error registering generic PHY (%ld)\n",
 72			PTR_ERR(phy));
 73		return PTR_ERR(phy);
 74	}
 75
 76	dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
 77	if (!dwc2) {
 78		dev_err(dev, "couldn't allocate dwc2 device\n");
 79		ret = -ENOMEM;
 80		goto err;
 81	}
 82
 83	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 84
 85	res[0].start	= pci_resource_start(pci, 0);
 86	res[0].end	= pci_resource_end(pci, 0);
 87	res[0].name	= "dwc2";
 88	res[0].flags	= IORESOURCE_MEM;
 89
 90	res[1].start	= pci->irq;
 91	res[1].name	= "dwc2";
 92	res[1].flags	= IORESOURCE_IRQ;
 93
 94	ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
 95	if (ret) {
 96		dev_err(dev, "couldn't add resources to dwc2 device\n");
 97		goto err;
 98	}
 99
100	dwc2->dev.parent = dev;
101
102	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
103	if (!glue) {
104		ret = -ENOMEM;
105		goto err;
106	}
107
108	ret = platform_device_add(dwc2);
109	if (ret) {
110		dev_err(dev, "failed to register dwc2 device\n");
111		goto err;
112	}
113
114	glue->phy = phy;
115	glue->dwc2 = dwc2;
116	pci_set_drvdata(pci, glue);
117
118	return 0;
119err:
120	usb_phy_generic_unregister(phy);
121	platform_device_put(dwc2);
122	return ret;
123}
124
125static struct pci_driver dwc2_pci_driver = {
126	.name = dwc2_driver_name,
127	.id_table = dwc2_pci_ids,
128	.probe = dwc2_pci_probe,
129	.remove = dwc2_pci_remove,
130};
131
132module_pci_driver(dwc2_pci_driver);
133
134MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
135MODULE_AUTHOR("Synopsys, Inc.");
136MODULE_LICENSE("Dual BSD/GPL");