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10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/pci.h>
13#include <linux/platform_device.h>
14#include <linux/dma-mapping.h>
15#include <linux/slab.h>
16
17struct cdns3_wrap {
18 struct platform_device *plat_dev;
19 struct resource dev_res[6];
20 int devfn;
21};
22
23#define RES_IRQ_HOST_ID 0
24#define RES_IRQ_PERIPHERAL_ID 1
25#define RES_IRQ_OTG_ID 2
26#define RES_HOST_ID 3
27#define RES_DEV_ID 4
28#define RES_DRD_ID 5
29
30#define PCI_BAR_HOST 0
31#define PCI_BAR_DEV 2
32#define PCI_BAR_OTG 0
33
34#define PCI_DEV_FN_HOST_DEVICE 0
35#define PCI_DEV_FN_OTG 1
36
37#define PCI_DRIVER_NAME "cdns3-pci-usbss"
38#define PLAT_DRIVER_NAME "cdns-usb3"
39
40#define CDNS_VENDOR_ID 0x17cd
41#define CDNS_DEVICE_ID 0x0100
42
43static struct pci_dev *cdns3_get_second_fun(struct pci_dev *pdev)
44{
45 struct pci_dev *func;
46
47
48
49
50
51
52
53 func = pci_get_device(pdev->vendor, pdev->device, NULL);
54 if (unlikely(!func))
55 return NULL;
56
57 if (func->devfn == pdev->devfn) {
58 func = pci_get_device(pdev->vendor, pdev->device, func);
59 if (unlikely(!func))
60 return NULL;
61 }
62
63 return func;
64}
65
66static int cdns3_pci_probe(struct pci_dev *pdev,
67 const struct pci_device_id *id)
68{
69 struct platform_device_info plat_info;
70 struct cdns3_wrap *wrap;
71 struct resource *res;
72 struct pci_dev *func;
73 int err;
74
75
76
77
78
79 if (!id || (pdev->devfn != PCI_DEV_FN_HOST_DEVICE &&
80 pdev->devfn != PCI_DEV_FN_OTG))
81 return -EINVAL;
82
83 func = cdns3_get_second_fun(pdev);
84 if (unlikely(!func))
85 return -EINVAL;
86
87 err = pcim_enable_device(pdev);
88 if (err) {
89 dev_err(&pdev->dev, "Enabling PCI device has failed %d\n", err);
90 return err;
91 }
92
93 pci_set_master(pdev);
94
95 if (pci_is_enabled(func)) {
96 wrap = pci_get_drvdata(func);
97 } else {
98 wrap = kzalloc(sizeof(*wrap), GFP_KERNEL);
99 if (!wrap) {
100 pci_disable_device(pdev);
101 return -ENOMEM;
102 }
103 }
104
105 res = wrap->dev_res;
106
107 if (pdev->devfn == PCI_DEV_FN_HOST_DEVICE) {
108
109 dev_dbg(&pdev->dev, "Initialize Device resources\n");
110 res[RES_DEV_ID].start = pci_resource_start(pdev, PCI_BAR_DEV);
111 res[RES_DEV_ID].end = pci_resource_end(pdev, PCI_BAR_DEV);
112 res[RES_DEV_ID].name = "dev";
113 res[RES_DEV_ID].flags = IORESOURCE_MEM;
114 dev_dbg(&pdev->dev, "USBSS-DEV physical base addr: %pa\n",
115 &res[RES_DEV_ID].start);
116
117 res[RES_HOST_ID].start = pci_resource_start(pdev, PCI_BAR_HOST);
118 res[RES_HOST_ID].end = pci_resource_end(pdev, PCI_BAR_HOST);
119 res[RES_HOST_ID].name = "xhci";
120 res[RES_HOST_ID].flags = IORESOURCE_MEM;
121 dev_dbg(&pdev->dev, "USBSS-XHCI physical base addr: %pa\n",
122 &res[RES_HOST_ID].start);
123
124
125 wrap->dev_res[RES_IRQ_HOST_ID].start = pdev->irq;
126 wrap->dev_res[RES_IRQ_HOST_ID].name = "host";
127 wrap->dev_res[RES_IRQ_HOST_ID].flags = IORESOURCE_IRQ;
128
129
130 wrap->dev_res[RES_IRQ_PERIPHERAL_ID].start = pdev->irq;
131 wrap->dev_res[RES_IRQ_PERIPHERAL_ID].name = "peripheral";
132 wrap->dev_res[RES_IRQ_PERIPHERAL_ID].flags = IORESOURCE_IRQ;
133 } else {
134 res[RES_DRD_ID].start = pci_resource_start(pdev, PCI_BAR_OTG);
135 res[RES_DRD_ID].end = pci_resource_end(pdev, PCI_BAR_OTG);
136 res[RES_DRD_ID].name = "otg";
137 res[RES_DRD_ID].flags = IORESOURCE_MEM;
138 dev_dbg(&pdev->dev, "USBSS-DRD physical base addr: %pa\n",
139 &res[RES_DRD_ID].start);
140
141
142 wrap->dev_res[RES_IRQ_OTG_ID].start = pdev->irq;
143 wrap->dev_res[RES_IRQ_OTG_ID].name = "otg";
144 wrap->dev_res[RES_IRQ_OTG_ID].flags = IORESOURCE_IRQ;
145 }
146
147 if (pci_is_enabled(func)) {
148
149 memset(&plat_info, 0, sizeof(plat_info));
150 plat_info.parent = &pdev->dev;
151 plat_info.fwnode = pdev->dev.fwnode;
152 plat_info.name = PLAT_DRIVER_NAME;
153 plat_info.id = pdev->devfn;
154 wrap->devfn = pdev->devfn;
155 plat_info.res = wrap->dev_res;
156 plat_info.num_res = ARRAY_SIZE(wrap->dev_res);
157 plat_info.dma_mask = pdev->dma_mask;
158
159 wrap->plat_dev = platform_device_register_full(&plat_info);
160 if (IS_ERR(wrap->plat_dev)) {
161 pci_disable_device(pdev);
162 err = PTR_ERR(wrap->plat_dev);
163 kfree(wrap);
164 return err;
165 }
166 }
167
168 pci_set_drvdata(pdev, wrap);
169 return err;
170}
171
172static void cdns3_pci_remove(struct pci_dev *pdev)
173{
174 struct cdns3_wrap *wrap;
175 struct pci_dev *func;
176
177 func = cdns3_get_second_fun(pdev);
178
179 wrap = (struct cdns3_wrap *)pci_get_drvdata(pdev);
180 if (wrap->devfn == pdev->devfn)
181 platform_device_unregister(wrap->plat_dev);
182
183 if (!pci_is_enabled(func))
184 kfree(wrap);
185}
186
187static const struct pci_device_id cdns3_pci_ids[] = {
188 { PCI_DEVICE(CDNS_VENDOR_ID, CDNS_DEVICE_ID), },
189 { 0, }
190};
191
192static struct pci_driver cdns3_pci_driver = {
193 .name = PCI_DRIVER_NAME,
194 .id_table = cdns3_pci_ids,
195 .probe = cdns3_pci_probe,
196 .remove = cdns3_pci_remove,
197};
198
199module_pci_driver(cdns3_pci_driver);
200MODULE_DEVICE_TABLE(pci, cdns3_pci_ids);
201
202MODULE_AUTHOR("Pawel Laszczak <pawell@cadence.com>");
203MODULE_LICENSE("GPL v2");
204MODULE_DESCRIPTION("Cadence USBSS PCI wrapper");
205
