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/*
* Copyright (c) 2011 The Chromium OS Authors.
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <usb.h>
#include "usb_ether.h"
typedef void (*usb_eth_before_probe)(void);
typedef int (*usb_eth_probe)(struct usb_device *dev, unsigned int ifnum,
struct ueth_data *ss);
typedef int (*usb_eth_get_info)(struct usb_device *dev, struct ueth_data *ss,
struct eth_device *dev_desc);
struct usb_eth_prob_dev {
usb_eth_before_probe before_probe; /* optional */
usb_eth_probe probe;
usb_eth_get_info get_info;
};
/* driver functions go here, each bracketed by #ifdef CONFIG_USB_ETHER_xxx */
static const struct usb_eth_prob_dev prob_dev[] = {
#ifdef CONFIG_USB_ETHER_ASIX
{
.before_probe = asix_eth_before_probe,
.probe = asix_eth_probe,
.get_info = asix_eth_get_info,
},
#endif
{ }, /* END */
};
static int usb_max_eth_dev; /* number of highest available usb eth device */
static struct ueth_data usb_eth[USB_MAX_ETH_DEV];
/*******************************************************************************
* tell if current ethernet device is a usb dongle
*/
int is_eth_dev_on_usb_host(void)
{
int i;
struct eth_device *dev = eth_get_dev();
if (dev) {
for (i = 0; i < usb_max_eth_dev; i++)
if (&usb_eth[i].eth_dev == dev)
return 1;
}
return 0;
}
/*
* Given a USB device, ask each driver if it can support it, and attach it
* to the first driver that says 'yes'
*/
static void probe_valid_drivers(struct usb_device *dev)
{
int j;
for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) {
if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev]))
continue;
/*
* ok, it is a supported eth device. Get info and fill it in
*/
if (prob_dev[j].get_info(dev,
&usb_eth[usb_max_eth_dev],
&usb_eth[usb_max_eth_dev].eth_dev)) {
/* found proper driver */
/* register with networking stack */
usb_max_eth_dev++;
/*
* usb_max_eth_dev must be incremented prior to this
* call since eth_current_changed (internally called)
* relies on it
*/
eth_register(&usb_eth[usb_max_eth_dev - 1].eth_dev);
break;
}
}
}
/*******************************************************************************
* scan the usb and reports device info
* to the user if mode = 1
* returns current device or -1 if no
*/
int usb_host_eth_scan(int mode)
{
int i, old_async;
struct usb_device *dev;
if (mode == 1)
printf(" scanning bus for ethernet devices... ");
old_async = usb_disable_asynch(1); /* asynch transfer not allowed */
for (i = 0; i < USB_MAX_ETH_DEV; i++)
memset(&usb_eth[i], 0, sizeof(usb_eth[i]));
for (i = 0; prob_dev[i].probe; i++) {
if (prob_dev[i].before_probe)
prob_dev[i].before_probe();
}
usb_max_eth_dev = 0;
for (i = 0; i < USB_MAX_DEVICE; i++) {
dev = usb_get_dev_index(i); /* get device */
debug("i=%d\n", i);
if (dev == NULL)
break; /* no more devices avaiable */
/* find valid usb_ether driver for this device, if any */
probe_valid_drivers(dev);
/* check limit */
if (usb_max_eth_dev == USB_MAX_ETH_DEV) {
printf("max USB Ethernet Device reached: %d stopping\n",
usb_max_eth_dev);
break;
}
} /* for */
usb_disable_asynch(old_async); /* restore asynch value */
printf("%d Ethernet Device(s) found\n", usb_max_eth_dev);
if (usb_max_eth_dev > 0)
return 0;
return -1;
}
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