xref: /kernel/linux/linux-6.6/drivers/usb/dwc2/pci.c (revision 62306a36) 
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");
137