u-boot/drivers/usb/eth/usb_ether.c
Simon Glass c0ad74e465 dm: usb: Add support for USB ethernet devices with driver model
Add support for scanning USB etghernet devices with driver model. This mostly
involves scanning all buses since device numbering is not unique across
buses.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
2015-04-18 11:11:27 -06:00

199 lines
4.8 KiB
C

/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <usb.h>
#include <dm/device-internal.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
#ifdef CONFIG_USB_ETHER_ASIX88179
{
.before_probe = ax88179_eth_before_probe,
.probe = ax88179_eth_probe,
.get_info = ax88179_eth_get_info,
},
#endif
#ifdef CONFIG_USB_ETHER_MCS7830
{
.before_probe = mcs7830_eth_before_probe,
.probe = mcs7830_eth_probe,
.get_info = mcs7830_eth_get_info,
},
#endif
#ifdef CONFIG_USB_ETHER_SMSC95XX
{
.before_probe = smsc95xx_eth_before_probe,
.probe = smsc95xx_eth_probe,
.get_info = smsc95xx_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)
{
struct eth_device *eth;
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
*/
eth = &usb_eth[usb_max_eth_dev].eth_dev;
if (prob_dev[j].get_info(dev,
&usb_eth[usb_max_eth_dev],
eth)) {
/* 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(eth);
if (eth_write_hwaddr(eth, "usbeth",
usb_max_eth_dev - 1))
puts("Warning: failed to set MAC address\n");
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;
if (mode == 1)
printf(" scanning usb for ethernet devices... ");
old_async = usb_disable_asynch(1); /* asynch transfer not allowed */
/* unregister a previously detected device */
for (i = 0; i < usb_max_eth_dev; i++)
eth_unregister(&usb_eth[i].eth_dev);
memset(usb_eth, 0, sizeof(usb_eth));
for (i = 0; prob_dev[i].probe; i++) {
if (prob_dev[i].before_probe)
prob_dev[i].before_probe();
}
usb_max_eth_dev = 0;
#ifdef CONFIG_DM_USB
/*
* TODO: We should add USB_DEVICE() declarations to each USB ethernet
* driver and then most of this file can be removed.
*/
struct udevice *bus;
struct uclass *uc;
int ret;
ret = uclass_get(UCLASS_USB, &uc);
if (ret)
return ret;
uclass_foreach_dev(bus, uc) {
for (i = 0; i < USB_MAX_DEVICE; i++) {
struct usb_device *dev;
dev = usb_get_dev_index(bus, i); /* get device */
debug("i=%d, %s\n", i, dev ? dev->dev->name : "(done)");
if (!dev)
break; /* no more devices available */
/*
* 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)
break;
} /* for */
}
#else
for (i = 0; i < USB_MAX_DEVICE; i++) {
struct usb_device *dev;
dev = usb_get_dev_index(i); /* get device */
debug("i=%d\n", i);
if (!dev)
break; /* no more devices available */
/* 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)
break;
} /* for */
#endif
if (usb_max_eth_dev == USB_MAX_ETH_DEV) {
printf("max USB Ethernet Device reached: %d stopping\n",
usb_max_eth_dev);
}
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;
}