blob: f361e8b16857eeb7815f7ae594e83567246bce09 [file] [log] [blame]
Simon Glass89d48362011-02-16 11:14:33 -08001/*
2 * Copyright (c) 2011 The Chromium OS Authors.
3 * See file CREDITS for list of people who contributed to this
4 * project.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
19 * MA 02111-1307 USA
20 */
21
22#include <common.h>
23#include <usb.h>
24
25#include "usb_ether.h"
26
27typedef void (*usb_eth_before_probe)(void);
28typedef int (*usb_eth_probe)(struct usb_device *dev, unsigned int ifnum,
29 struct ueth_data *ss);
30typedef int (*usb_eth_get_info)(struct usb_device *dev, struct ueth_data *ss,
31 struct eth_device *dev_desc);
32
33struct usb_eth_prob_dev {
34 usb_eth_before_probe before_probe; /* optional */
35 usb_eth_probe probe;
36 usb_eth_get_info get_info;
37};
38
39/* driver functions go here, each bracketed by #ifdef CONFIG_USB_ETHER_xxx */
40static const struct usb_eth_prob_dev prob_dev[] = {
Simon Glass9b70e002011-02-16 11:14:34 -080041#ifdef CONFIG_USB_ETHER_ASIX
42 {
43 .before_probe = asix_eth_before_probe,
44 .probe = asix_eth_probe,
45 .get_info = asix_eth_get_info,
46 },
47#endif
Simon Glass291391b2011-06-13 16:13:09 -070048#ifdef CONFIG_USB_ETHER_SMSC95XX
49 {
50 .before_probe = smsc95xx_eth_before_probe,
51 .probe = smsc95xx_eth_probe,
52 .get_info = smsc95xx_eth_get_info,
53 },
54#endif
Simon Glass89d48362011-02-16 11:14:33 -080055 { }, /* END */
56};
57
58static int usb_max_eth_dev; /* number of highest available usb eth device */
59static struct ueth_data usb_eth[USB_MAX_ETH_DEV];
60
61/*******************************************************************************
62 * tell if current ethernet device is a usb dongle
63 */
64int is_eth_dev_on_usb_host(void)
65{
66 int i;
67 struct eth_device *dev = eth_get_dev();
68
69 if (dev) {
70 for (i = 0; i < usb_max_eth_dev; i++)
71 if (&usb_eth[i].eth_dev == dev)
72 return 1;
73 }
74 return 0;
75}
76
77/*
78 * Given a USB device, ask each driver if it can support it, and attach it
79 * to the first driver that says 'yes'
80 */
81static void probe_valid_drivers(struct usb_device *dev)
82{
Simon Glass7616e782011-06-13 16:13:10 -070083 struct eth_device *eth;
Simon Glass89d48362011-02-16 11:14:33 -080084 int j;
85
86 for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) {
87 if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev]))
88 continue;
89 /*
90 * ok, it is a supported eth device. Get info and fill it in
91 */
Simon Glass7616e782011-06-13 16:13:10 -070092 eth = &usb_eth[usb_max_eth_dev].eth_dev;
Simon Glass89d48362011-02-16 11:14:33 -080093 if (prob_dev[j].get_info(dev,
94 &usb_eth[usb_max_eth_dev],
Simon Glass7616e782011-06-13 16:13:10 -070095 eth)) {
Simon Glass89d48362011-02-16 11:14:33 -080096 /* found proper driver */
97 /* register with networking stack */
98 usb_max_eth_dev++;
99
100 /*
101 * usb_max_eth_dev must be incremented prior to this
102 * call since eth_current_changed (internally called)
103 * relies on it
104 */
Simon Glass7616e782011-06-13 16:13:10 -0700105 eth_register(eth);
106 if (eth_write_hwaddr(eth, "usbeth",
107 usb_max_eth_dev - 1))
108 puts("Warning: failed to set MAC address\n");
Simon Glass89d48362011-02-16 11:14:33 -0800109 break;
110 }
111 }
112 }
113
114/*******************************************************************************
115 * scan the usb and reports device info
116 * to the user if mode = 1
117 * returns current device or -1 if no
118 */
119int usb_host_eth_scan(int mode)
120{
121 int i, old_async;
122 struct usb_device *dev;
123
124
125 if (mode == 1)
Lucas Stach93c25822012-09-26 00:14:36 +0200126 printf(" scanning usb for ethernet devices... ");
Simon Glass89d48362011-02-16 11:14:33 -0800127
128 old_async = usb_disable_asynch(1); /* asynch transfer not allowed */
129
Vincent Palatine7e982d2012-01-09 08:32:36 +0000130 /* unregister a previously detected device */
131 for (i = 0; i < usb_max_eth_dev; i++)
132 eth_unregister(&usb_eth[i].eth_dev);
133
134 memset(usb_eth, 0, sizeof(usb_eth));
Simon Glass89d48362011-02-16 11:14:33 -0800135
136 for (i = 0; prob_dev[i].probe; i++) {
137 if (prob_dev[i].before_probe)
138 prob_dev[i].before_probe();
139 }
140
141 usb_max_eth_dev = 0;
142 for (i = 0; i < USB_MAX_DEVICE; i++) {
143 dev = usb_get_dev_index(i); /* get device */
144 debug("i=%d\n", i);
145 if (dev == NULL)
Peter Meerwaldd1f862f2012-02-08 05:31:54 +0000146 break; /* no more devices available */
Simon Glass89d48362011-02-16 11:14:33 -0800147
148 /* find valid usb_ether driver for this device, if any */
149 probe_valid_drivers(dev);
150
151 /* check limit */
152 if (usb_max_eth_dev == USB_MAX_ETH_DEV) {
153 printf("max USB Ethernet Device reached: %d stopping\n",
154 usb_max_eth_dev);
155 break;
156 }
157 } /* for */
158
159 usb_disable_asynch(old_async); /* restore asynch value */
160 printf("%d Ethernet Device(s) found\n", usb_max_eth_dev);
161 if (usb_max_eth_dev > 0)
162 return 0;
163 return -1;
164}