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 #define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0
28
29 static const char dwc2_driver_name[] = "dwc2-pci";
30
31 struct 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 */
dwc2_pci_remove(struct pci_dev * pci)42 static 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
dwc2_pci_probe(struct pci_dev * pci,const struct pci_device_id * id)51 static 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;
119 err:
120 usb_phy_generic_unregister(phy);
121 platform_device_put(dwc2);
122 return ret;
123 }
124
125 static const struct pci_device_id dwc2_pci_ids[] = {
126 {
127 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
128 },
129 {
130 PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
131 PCI_DEVICE_ID_STMICRO_USB_OTG),
132 },
133 { /* end: all zeroes */ }
134 };
135 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
136
137 static struct pci_driver dwc2_pci_driver = {
138 .name = dwc2_driver_name,
139 .id_table = dwc2_pci_ids,
140 .probe = dwc2_pci_probe,
141 .remove = dwc2_pci_remove,
142 };
143
144 module_pci_driver(dwc2_pci_driver);
145
146 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
147 MODULE_AUTHOR("Synopsys, Inc.");
148 MODULE_LICENSE("Dual BSD/GPL");
149