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 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The names of the above-listed copyright holders may not be used
17 * to endorse or promote products derived from this software without
18 * specific prior written permission.
19 *
20 * ALTERNATIVELY, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") as published by the Free Software
22 * Foundation; either version 2 of the License, or (at your option) any
23 * later version.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
26 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
27 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Provides the initialization and cleanup entry points for the DWC_otg PCI
40 * driver
41 */
42 #include <linux/kernel.h>
43 #include <linux/module.h>
44 #include <linux/moduleparam.h>
45 #include <linux/spinlock.h>
46 #include <linux/interrupt.h>
47 #include <linux/io.h>
48 #include <linux/slab.h>
49 #include <linux/pci.h>
50 #include <linux/usb.h>
51
52 #include <linux/usb/hcd.h>
53 #include <linux/usb/ch11.h>
54 #include <linux/platform_device.h>
55 #include <linux/usb/usb_phy_generic.h>
56
57 #define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0
58
59 static const char dwc2_driver_name[] = "dwc2-pci";
60
61 struct dwc2_pci_glue {
62 struct platform_device *dwc2;
63 struct platform_device *phy;
64 };
65
66 /**
67 * dwc2_pci_remove() - Provides the cleanup entry points for the DWC_otg PCI
68 * driver
69 *
70 * @pci: The programming view of DWC_otg PCI
71 */
dwc2_pci_remove(struct pci_dev * pci)72 static void dwc2_pci_remove(struct pci_dev *pci)
73 {
74 struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
75
76 platform_device_unregister(glue->dwc2);
77 usb_phy_generic_unregister(glue->phy);
78 pci_set_drvdata(pci, NULL);
79 }
80
dwc2_pci_probe(struct pci_dev * pci,const struct pci_device_id * id)81 static int dwc2_pci_probe(struct pci_dev *pci,
82 const struct pci_device_id *id)
83 {
84 struct resource res[2];
85 struct platform_device *dwc2;
86 struct platform_device *phy;
87 int ret;
88 struct device *dev = &pci->dev;
89 struct dwc2_pci_glue *glue;
90
91 ret = pcim_enable_device(pci);
92 if (ret) {
93 dev_err(dev, "failed to enable pci device\n");
94 return -ENODEV;
95 }
96
97 pci_set_master(pci);
98
99 phy = usb_phy_generic_register();
100 if (IS_ERR(phy)) {
101 dev_err(dev, "error registering generic PHY (%ld)\n",
102 PTR_ERR(phy));
103 return PTR_ERR(phy);
104 }
105
106 dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
107 if (!dwc2) {
108 dev_err(dev, "couldn't allocate dwc2 device\n");
109 ret = -ENOMEM;
110 goto err;
111 }
112
113 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
114
115 res[0].start = pci_resource_start(pci, 0);
116 res[0].end = pci_resource_end(pci, 0);
117 res[0].name = "dwc2";
118 res[0].flags = IORESOURCE_MEM;
119
120 res[1].start = pci->irq;
121 res[1].name = "dwc2";
122 res[1].flags = IORESOURCE_IRQ;
123
124 ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
125 if (ret) {
126 dev_err(dev, "couldn't add resources to dwc2 device\n");
127 goto err;
128 }
129
130 dwc2->dev.parent = dev;
131
132 glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
133 if (!glue) {
134 ret = -ENOMEM;
135 goto err;
136 }
137
138 ret = platform_device_add(dwc2);
139 if (ret) {
140 dev_err(dev, "failed to register dwc2 device\n");
141 goto err;
142 }
143
144 glue->phy = phy;
145 glue->dwc2 = dwc2;
146 pci_set_drvdata(pci, glue);
147
148 return 0;
149 err:
150 usb_phy_generic_unregister(phy);
151 platform_device_put(dwc2);
152 return ret;
153 }
154
155 static const struct pci_device_id dwc2_pci_ids[] = {
156 {
157 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
158 },
159 {
160 PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
161 PCI_DEVICE_ID_STMICRO_USB_OTG),
162 },
163 { /* end: all zeroes */ }
164 };
165 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
166
167 static struct pci_driver dwc2_pci_driver = {
168 .name = dwc2_driver_name,
169 .id_table = dwc2_pci_ids,
170 .probe = dwc2_pci_probe,
171 .remove = dwc2_pci_remove,
172 };
173
174 module_pci_driver(dwc2_pci_driver);
175
176 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
177 MODULE_AUTHOR("Synopsys, Inc.");
178 MODULE_LICENSE("Dual BSD/GPL");
179