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 | |
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 | */ |
42 | static void dwc2_pci_remove(struct pci_dev *pci) |
43 | { |
44 | struct dwc2_pci_glue *glue = pci_get_drvdata(pdev: pci); |
45 | |
46 | platform_device_unregister(glue->dwc2); |
47 | usb_phy_generic_unregister(glue->phy); |
48 | pci_set_drvdata(pdev: pci, NULL); |
49 | } |
50 | |
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(pdev: pci); |
62 | if (ret) { |
63 | dev_err(dev, "failed to enable pci device\n" ); |
64 | return -ENODEV; |
65 | } |
66 | |
67 | pci_set_master(dev: pci); |
68 | |
69 | phy = usb_phy_generic_register(); |
70 | if (IS_ERR(ptr: phy)) { |
71 | dev_err(dev, "error registering generic PHY (%ld)\n" , |
72 | PTR_ERR(phy)); |
73 | return PTR_ERR(ptr: phy); |
74 | } |
75 | |
76 | dwc2 = platform_device_alloc(name: "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(pdev: 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, size: sizeof(*glue), GFP_KERNEL); |
103 | if (!glue) { |
104 | ret = -ENOMEM; |
105 | goto err; |
106 | } |
107 | |
108 | ret = platform_device_add(pdev: 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(pdev: pci, data: glue); |
117 | |
118 | return 0; |
119 | err: |
120 | usb_phy_generic_unregister(phy); |
121 | platform_device_put(pdev: dwc2); |
122 | return ret; |
123 | } |
124 | |
125 | static 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 | |
132 | module_pci_driver(dwc2_pci_driver); |
133 | |
134 | MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue" ); |
135 | MODULE_AUTHOR("Synopsys, Inc." ); |
136 | MODULE_LICENSE("Dual BSD/GPL" ); |
137 | |