xref: /openbmc/linux/drivers/usb/dwc3/dwc3-pci.c (revision b34e08d5)
1 /**
2  * dwc3-pci.c - PCI Specific glue layer
3  *
4  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
5  *
6  * Authors: Felipe Balbi <balbi@ti.com>,
7  *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
8  *
9  * This program is free software: you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2  of
11  * the License as published by the Free Software Foundation.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  */
18 
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/slab.h>
22 #include <linux/pci.h>
23 #include <linux/platform_device.h>
24 
25 #include <linux/usb/otg.h>
26 #include <linux/usb/usb_phy_generic.h>
27 
28 /* FIXME define these in <linux/pci_ids.h> */
29 #define PCI_VENDOR_ID_SYNOPSYS		0x16c3
30 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3	0xabcd
31 #define PCI_DEVICE_ID_INTEL_BYT		0x0f37
32 #define PCI_DEVICE_ID_INTEL_MRFLD	0x119e
33 
34 struct dwc3_pci {
35 	struct device		*dev;
36 	struct platform_device	*dwc3;
37 	struct platform_device	*usb2_phy;
38 	struct platform_device	*usb3_phy;
39 };
40 
41 static int dwc3_pci_register_phys(struct dwc3_pci *glue)
42 {
43 	struct usb_phy_generic_platform_data pdata;
44 	struct platform_device	*pdev;
45 	int			ret;
46 
47 	memset(&pdata, 0x00, sizeof(pdata));
48 
49 	pdev = platform_device_alloc("usb_phy_generic", 0);
50 	if (!pdev)
51 		return -ENOMEM;
52 
53 	glue->usb2_phy = pdev;
54 	pdata.type = USB_PHY_TYPE_USB2;
55 	pdata.gpio_reset = -1;
56 
57 	ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
58 	if (ret)
59 		goto err1;
60 
61 	pdev = platform_device_alloc("usb_phy_generic", 1);
62 	if (!pdev) {
63 		ret = -ENOMEM;
64 		goto err1;
65 	}
66 
67 	glue->usb3_phy = pdev;
68 	pdata.type = USB_PHY_TYPE_USB3;
69 
70 	ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
71 	if (ret)
72 		goto err2;
73 
74 	ret = platform_device_add(glue->usb2_phy);
75 	if (ret)
76 		goto err2;
77 
78 	ret = platform_device_add(glue->usb3_phy);
79 	if (ret)
80 		goto err3;
81 
82 	return 0;
83 
84 err3:
85 	platform_device_del(glue->usb2_phy);
86 
87 err2:
88 	platform_device_put(glue->usb3_phy);
89 
90 err1:
91 	platform_device_put(glue->usb2_phy);
92 
93 	return ret;
94 }
95 
96 static int dwc3_pci_probe(struct pci_dev *pci,
97 		const struct pci_device_id *id)
98 {
99 	struct resource		res[2];
100 	struct platform_device	*dwc3;
101 	struct dwc3_pci		*glue;
102 	int			ret = -ENOMEM;
103 	struct device		*dev = &pci->dev;
104 
105 	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
106 	if (!glue) {
107 		dev_err(dev, "not enough memory\n");
108 		return -ENOMEM;
109 	}
110 
111 	glue->dev = dev;
112 
113 	ret = pci_enable_device(pci);
114 	if (ret) {
115 		dev_err(dev, "failed to enable pci device\n");
116 		return -ENODEV;
117 	}
118 
119 	pci_set_master(pci);
120 
121 	ret = dwc3_pci_register_phys(glue);
122 	if (ret) {
123 		dev_err(dev, "couldn't register PHYs\n");
124 		return ret;
125 	}
126 
127 	dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
128 	if (!dwc3) {
129 		dev_err(dev, "couldn't allocate dwc3 device\n");
130 		ret = -ENOMEM;
131 		goto err1;
132 	}
133 
134 	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
135 
136 	res[0].start	= pci_resource_start(pci, 0);
137 	res[0].end	= pci_resource_end(pci, 0);
138 	res[0].name	= "dwc_usb3";
139 	res[0].flags	= IORESOURCE_MEM;
140 
141 	res[1].start	= pci->irq;
142 	res[1].name	= "dwc_usb3";
143 	res[1].flags	= IORESOURCE_IRQ;
144 
145 	ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
146 	if (ret) {
147 		dev_err(dev, "couldn't add resources to dwc3 device\n");
148 		goto err1;
149 	}
150 
151 	pci_set_drvdata(pci, glue);
152 
153 	dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
154 
155 	dwc3->dev.dma_mask = dev->dma_mask;
156 	dwc3->dev.dma_parms = dev->dma_parms;
157 	dwc3->dev.parent = dev;
158 	glue->dwc3 = dwc3;
159 
160 	ret = platform_device_add(dwc3);
161 	if (ret) {
162 		dev_err(dev, "failed to register dwc3 device\n");
163 		goto err3;
164 	}
165 
166 	return 0;
167 
168 err3:
169 	platform_device_put(dwc3);
170 err1:
171 	pci_disable_device(pci);
172 
173 	return ret;
174 }
175 
176 static void dwc3_pci_remove(struct pci_dev *pci)
177 {
178 	struct dwc3_pci	*glue = pci_get_drvdata(pci);
179 
180 	platform_device_unregister(glue->dwc3);
181 	platform_device_unregister(glue->usb2_phy);
182 	platform_device_unregister(glue->usb3_phy);
183 	pci_disable_device(pci);
184 }
185 
186 static const struct pci_device_id dwc3_pci_id_table[] = {
187 	{
188 		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
189 				PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
190 	},
191 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
192 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
193 	{  }	/* Terminating Entry */
194 };
195 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
196 
197 #ifdef CONFIG_PM_SLEEP
198 static int dwc3_pci_suspend(struct device *dev)
199 {
200 	struct pci_dev	*pci = to_pci_dev(dev);
201 
202 	pci_disable_device(pci);
203 
204 	return 0;
205 }
206 
207 static int dwc3_pci_resume(struct device *dev)
208 {
209 	struct pci_dev	*pci = to_pci_dev(dev);
210 	int		ret;
211 
212 	ret = pci_enable_device(pci);
213 	if (ret) {
214 		dev_err(dev, "can't re-enable device --> %d\n", ret);
215 		return ret;
216 	}
217 
218 	pci_set_master(pci);
219 
220 	return 0;
221 }
222 #endif /* CONFIG_PM_SLEEP */
223 
224 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
225 	SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
226 };
227 
228 static struct pci_driver dwc3_pci_driver = {
229 	.name		= "dwc3-pci",
230 	.id_table	= dwc3_pci_id_table,
231 	.probe		= dwc3_pci_probe,
232 	.remove		= dwc3_pci_remove,
233 	.driver		= {
234 		.pm	= &dwc3_pci_dev_pm_ops,
235 	},
236 };
237 
238 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
239 MODULE_LICENSE("GPL v2");
240 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
241 
242 module_pci_driver(dwc3_pci_driver);
243