xref: /openbmc/linux/drivers/usb/dwc3/host.c (revision 6774def6)
1 /**
2  * host.c - DesignWare USB3 DRD Controller Host Glue
3  *
4  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
5  *
6  * Authors: Felipe Balbi <balbi@ti.com>,
7  *
8  * This program is free software: you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2  of
10  * the License as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  */
17 
18 #include <linux/platform_device.h>
19 #include <linux/usb/xhci_pdriver.h>
20 
21 #include "core.h"
22 
23 int dwc3_host_init(struct dwc3 *dwc)
24 {
25 	struct platform_device	*xhci;
26 	struct usb_xhci_pdata	pdata;
27 	int			ret;
28 
29 	xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
30 	if (!xhci) {
31 		dev_err(dwc->dev, "couldn't allocate xHCI device\n");
32 		ret = -ENOMEM;
33 		goto err0;
34 	}
35 
36 	dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
37 
38 	xhci->dev.parent	= dwc->dev;
39 	xhci->dev.dma_mask	= dwc->dev->dma_mask;
40 	xhci->dev.dma_parms	= dwc->dev->dma_parms;
41 
42 	dwc->xhci = xhci;
43 
44 	ret = platform_device_add_resources(xhci, dwc->xhci_resources,
45 						DWC3_XHCI_RESOURCES_NUM);
46 	if (ret) {
47 		dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
48 		goto err1;
49 	}
50 
51 	memset(&pdata, 0, sizeof(pdata));
52 
53 #ifdef CONFIG_DWC3_HOST_USB3_LPM_ENABLE
54 	pdata.usb3_lpm_capable = 1;
55 #endif
56 
57 	ret = platform_device_add_data(xhci, &pdata, sizeof(pdata));
58 	if (ret) {
59 		dev_err(dwc->dev, "couldn't add platform data to xHCI device\n");
60 		goto err1;
61 	}
62 
63 	ret = platform_device_add(xhci);
64 	if (ret) {
65 		dev_err(dwc->dev, "failed to register xHCI device\n");
66 		goto err1;
67 	}
68 
69 	return 0;
70 
71 err1:
72 	platform_device_put(xhci);
73 
74 err0:
75 	return ret;
76 }
77 
78 void dwc3_host_exit(struct dwc3 *dwc)
79 {
80 	platform_device_unregister(dwc->xhci);
81 }
82