1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
4  * Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
5  */
6 
7 #include <common.h>
8 #include <dm.h>
9 #include <dm/device-internal.h>
10 #include <linux/usb/gadget.h>
11 
12 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
13 #define MAX_UDC_DEVICES 4
14 static struct udevice *dev_array[MAX_UDC_DEVICES];
15 int usb_gadget_initialize(int index)
16 {
17 	int ret;
18 	struct udevice *dev = NULL;
19 
20 	if (index < 0 || index >= ARRAY_SIZE(dev_array))
21 		return -EINVAL;
22 	if (dev_array[index])
23 		return 0;
24 	ret = uclass_get_device_by_seq(UCLASS_USB_GADGET_GENERIC, index, &dev);
25 	if (!dev || ret) {
26 		pr_err("No USB device found\n");
27 		return -ENODEV;
28 	}
29 	dev_array[index] = dev;
30 	return 0;
31 }
32 
33 int usb_gadget_release(int index)
34 {
35 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
36 	int ret;
37 	if (index < 0 || index >= ARRAY_SIZE(dev_array))
38 		return -EINVAL;
39 
40 	ret = device_remove(dev_array[index], DM_REMOVE_NORMAL);
41 	if (!ret)
42 		dev_array[index] = NULL;
43 	return ret;
44 #else
45 	return -ENOTSUPP;
46 #endif
47 }
48 
49 int usb_gadget_handle_interrupts(int index)
50 {
51 	if (index < 0 || index >= ARRAY_SIZE(dev_array))
52 		return -EINVAL;
53 	return dm_usb_gadget_handle_interrupts(dev_array[index]);
54 }
55 #endif
56 
57 UCLASS_DRIVER(usb_gadget_generic) = {
58 	.id		= UCLASS_USB_GADGET_GENERIC,
59 	.name		= "usb",
60 	.flags		= DM_UC_FLAG_SEQ_ALIAS,
61 };
62