2 * Copyright (c) 2011 The Chromium OS Authors.
4 * SPDX-License-Identifier: GPL-2.0+
10 #include "usb_ether.h"
12 typedef void (*usb_eth_before_probe)(void);
13 typedef int (*usb_eth_probe)(struct usb_device *dev, unsigned int ifnum,
14 struct ueth_data *ss);
15 typedef int (*usb_eth_get_info)(struct usb_device *dev, struct ueth_data *ss,
16 struct eth_device *dev_desc);
18 struct usb_eth_prob_dev {
19 usb_eth_before_probe before_probe; /* optional */
21 usb_eth_get_info get_info;
24 /* driver functions go here, each bracketed by #ifdef CONFIG_USB_ETHER_xxx */
25 static const struct usb_eth_prob_dev prob_dev[] = {
26 #ifdef CONFIG_USB_ETHER_ASIX
28 .before_probe = asix_eth_before_probe,
29 .probe = asix_eth_probe,
30 .get_info = asix_eth_get_info,
33 #ifdef CONFIG_USB_ETHER_MCS7830
35 .before_probe = mcs7830_eth_before_probe,
36 .probe = mcs7830_eth_probe,
37 .get_info = mcs7830_eth_get_info,
40 #ifdef CONFIG_USB_ETHER_SMSC95XX
42 .before_probe = smsc95xx_eth_before_probe,
43 .probe = smsc95xx_eth_probe,
44 .get_info = smsc95xx_eth_get_info,
50 static int usb_max_eth_dev; /* number of highest available usb eth device */
51 static struct ueth_data usb_eth[USB_MAX_ETH_DEV];
53 /*******************************************************************************
54 * tell if current ethernet device is a usb dongle
56 int is_eth_dev_on_usb_host(void)
59 struct eth_device *dev = eth_get_dev();
62 for (i = 0; i < usb_max_eth_dev; i++)
63 if (&usb_eth[i].eth_dev == dev)
70 * Given a USB device, ask each driver if it can support it, and attach it
71 * to the first driver that says 'yes'
73 static void probe_valid_drivers(struct usb_device *dev)
75 struct eth_device *eth;
78 for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) {
79 if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev]))
82 * ok, it is a supported eth device. Get info and fill it in
84 eth = &usb_eth[usb_max_eth_dev].eth_dev;
85 if (prob_dev[j].get_info(dev,
86 &usb_eth[usb_max_eth_dev],
88 /* found proper driver */
89 /* register with networking stack */
93 * usb_max_eth_dev must be incremented prior to this
94 * call since eth_current_changed (internally called)
98 if (eth_write_hwaddr(eth, "usbeth",
100 puts("Warning: failed to set MAC address\n");
106 /*******************************************************************************
107 * scan the usb and reports device info
108 * to the user if mode = 1
109 * returns current device or -1 if no
111 int usb_host_eth_scan(int mode)
114 struct usb_device *dev;
118 printf(" scanning usb for ethernet devices... ");
120 old_async = usb_disable_asynch(1); /* asynch transfer not allowed */
122 /* unregister a previously detected device */
123 for (i = 0; i < usb_max_eth_dev; i++)
124 eth_unregister(&usb_eth[i].eth_dev);
126 memset(usb_eth, 0, sizeof(usb_eth));
128 for (i = 0; prob_dev[i].probe; i++) {
129 if (prob_dev[i].before_probe)
130 prob_dev[i].before_probe();
134 for (i = 0; i < USB_MAX_DEVICE; i++) {
135 dev = usb_get_dev_index(i); /* get device */
138 break; /* no more devices available */
140 /* find valid usb_ether driver for this device, if any */
141 probe_valid_drivers(dev);
144 if (usb_max_eth_dev == USB_MAX_ETH_DEV) {
145 printf("max USB Ethernet Device reached: %d stopping\n",
151 usb_disable_asynch(old_async); /* restore asynch value */
152 printf("%d Ethernet Device(s) found\n", usb_max_eth_dev);
153 if (usb_max_eth_dev > 0)