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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011 The Chromium OS Authors.
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <malloc.h>
#include <net.h>
#include <usb.h>
#include <asm/cache.h>
#include <dm/device-internal.h>
#include "usb_ether.h"
#ifdef CONFIG_DM_ETH
#define USB_BULK_RECV_TIMEOUT 500
int usb_ether_register(struct udevice *dev, struct ueth_data *ueth, int rxsize)
{
struct usb_device *udev = dev_get_parent_priv(dev);
struct usb_interface_descriptor *iface_desc;
bool ep_in_found = false, ep_out_found = false;
struct usb_interface *iface;
const int ifnum = 0; /* Always use interface 0 */
int ret, i;
iface = &udev->config.if_desc[ifnum];
iface_desc = &udev->config.if_desc[ifnum].desc;
/* Initialize the ueth_data structure with some useful info */
ueth->ifnum = ifnum;
ueth->subclass = iface_desc->bInterfaceSubClass;
ueth->protocol = iface_desc->bInterfaceProtocol;
/*
* We are expecting a minimum of 3 endpoints - in, out (bulk), and int.
* We will ignore any others.
*/
for (i = 0; i < iface_desc->bNumEndpoints; i++) {
int ep_addr = iface->ep_desc[i].bEndpointAddress;
/* is it an BULK endpoint? */
if ((iface->ep_desc[i].bmAttributes &
USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
if (ep_addr & USB_DIR_IN && !ep_in_found) {
ueth->ep_in = ep_addr &
USB_ENDPOINT_NUMBER_MASK;
ep_in_found = true;
} else if (!(ep_addr & USB_DIR_IN) && !ep_out_found) {
ueth->ep_out = ep_addr &
USB_ENDPOINT_NUMBER_MASK;
ep_out_found = true;
}
}
/* is it an interrupt endpoint? */
if ((iface->ep_desc[i].bmAttributes &
USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
ueth->ep_int = iface->ep_desc[i].bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
ueth->irqinterval = iface->ep_desc[i].bInterval;
}
}
debug("Endpoints In %d Out %d Int %d\n", ueth->ep_in, ueth->ep_out,
ueth->ep_int);
/* Do some basic sanity checks, and bail if we find a problem */
if (!ueth->ep_in || !ueth->ep_out || !ueth->ep_int) {
debug("%s: %s: Cannot find endpoints\n", __func__, dev->name);
return -ENXIO;
}
ueth->rxsize = rxsize;
ueth->rxbuf = memalign(ARCH_DMA_MINALIGN, rxsize);
if (!ueth->rxbuf)
return -ENOMEM;
ret = usb_set_interface(udev, iface_desc->bInterfaceNumber, ifnum);
if (ret) {
debug("%s: %s: Cannot set interface: %d\n", __func__, dev->name,
ret);
return ret;
}
ueth->pusb_dev = udev;
return 0;
}
int usb_ether_deregister(struct ueth_data *ueth)
{
return 0;
}
int usb_ether_receive(struct ueth_data *ueth, int rxsize)
{
int actual_len;
int ret;
if (rxsize > ueth->rxsize)
return -EINVAL;
ret = usb_bulk_msg(ueth->pusb_dev,
usb_rcvbulkpipe(ueth->pusb_dev, ueth->ep_in),
ueth->rxbuf, rxsize, &actual_len,
USB_BULK_RECV_TIMEOUT);
debug("Rx: len = %u, actual = %u, err = %d\n", rxsize, actual_len, ret);
if (ret) {
printf("Rx: failed to receive: %d\n", ret);
return ret;
}
if (actual_len > rxsize) {
debug("Rx: received too many bytes %d\n", actual_len);
return -ENOSPC;
}
ueth->rxlen = actual_len;
ueth->rxptr = 0;
return actual_len ? 0 : -EAGAIN;
}
void usb_ether_advance_rxbuf(struct ueth_data *ueth, int num_bytes)
{
ueth->rxptr += num_bytes;
if (num_bytes < 0 || ueth->rxptr >= ueth->rxlen)
ueth->rxlen = 0;
}
int usb_ether_get_rx_bytes(struct ueth_data *ueth, uint8_t **ptrp)
{
if (!ueth->rxlen)
return 0;
*ptrp = &ueth->rxbuf[ueth->rxptr];
return ueth->rxlen - ueth->rxptr;
}
#else
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
#ifdef CONFIG_USB_ETHER_RTL8152
{
.before_probe = r8152_eth_before_probe,
.probe = r8152_eth_probe,
.get_info = r8152_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;
#if CONFIG_IS_ENABLED(DM_USB)
/*
* TODO: We should add U_BOOT_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;
}
#endif