This adds support for using USB Ethernet dongles in host mode. This is just the framework - drivers will come later. A new config option called CONFIG_USB_HOST_ETHER can be defined in board config files to switch this on. The was originally written by NVIDIA and was cleaned up for release by the Chromium authors. Signed-off-by: Simon Glass <sjg@chromium.org>master
Simon Glass
13 years ago
committed by
Remy Bohmer
parent
96820a3587
commit
89d48367ed
@ -0,0 +1,45 @@ |
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#
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# Copyright (c) 2011 The Chromium OS Authors.
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# See file CREDITS for list of people who contributed to this
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# project.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
|
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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include $(TOPDIR)/config.mk |
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LIB := $(obj)libusb_eth.a
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# new USB host ethernet layer dependencies
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COBJS-$(CONFIG_USB_HOST_ETHER) += usb_ether.o
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COBJS := $(COBJS-y)
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SRCS := $(COBJS:.o=.c)
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OBJS := $(addprefix $(obj),$(COBJS))
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all: $(LIB) |
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$(LIB): $(obj).depend $(OBJS) |
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$(AR) $(ARFLAGS) $@ $(OBJS)
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#########################################################################
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# defines $(obj).depend target
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include $(SRCTREE)/rules.mk |
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sinclude $(obj).depend |
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#########################################################################
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@ -0,0 +1,143 @@ |
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/*
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* Copyright (c) 2011 The Chromium OS Authors. |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <common.h> |
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#include <usb.h> |
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#include "usb_ether.h" |
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typedef void (*usb_eth_before_probe)(void); |
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typedef int (*usb_eth_probe)(struct usb_device *dev, unsigned int ifnum, |
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struct ueth_data *ss); |
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typedef int (*usb_eth_get_info)(struct usb_device *dev, struct ueth_data *ss, |
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struct eth_device *dev_desc); |
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struct usb_eth_prob_dev { |
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usb_eth_before_probe before_probe; /* optional */ |
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usb_eth_probe probe; |
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usb_eth_get_info get_info; |
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}; |
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/* driver functions go here, each bracketed by #ifdef CONFIG_USB_ETHER_xxx */ |
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static const struct usb_eth_prob_dev prob_dev[] = { |
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{ }, /* END */ |
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}; |
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static int usb_max_eth_dev; /* number of highest available usb eth device */ |
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static struct ueth_data usb_eth[USB_MAX_ETH_DEV]; |
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/*******************************************************************************
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* tell if current ethernet device is a usb dongle |
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*/ |
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int is_eth_dev_on_usb_host(void) |
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{ |
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int i; |
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struct eth_device *dev = eth_get_dev(); |
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if (dev) { |
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for (i = 0; i < usb_max_eth_dev; i++) |
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if (&usb_eth[i].eth_dev == dev) |
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return 1; |
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} |
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return 0; |
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} |
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/*
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* Given a USB device, ask each driver if it can support it, and attach it |
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* to the first driver that says 'yes' |
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*/ |
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static void probe_valid_drivers(struct usb_device *dev) |
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{ |
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int j; |
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for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) { |
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if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev])) |
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continue; |
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/*
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* ok, it is a supported eth device. Get info and fill it in |
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*/ |
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if (prob_dev[j].get_info(dev, |
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&usb_eth[usb_max_eth_dev], |
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&usb_eth[usb_max_eth_dev].eth_dev)) { |
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/* found proper driver */ |
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/* register with networking stack */ |
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usb_max_eth_dev++; |
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/*
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* usb_max_eth_dev must be incremented prior to this |
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* call since eth_current_changed (internally called) |
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* relies on it |
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*/ |
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eth_register(&usb_eth[usb_max_eth_dev - 1].eth_dev); |
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break; |
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} |
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} |
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} |
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/*******************************************************************************
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* scan the usb and reports device info |
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* to the user if mode = 1 |
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* returns current device or -1 if no |
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*/ |
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int usb_host_eth_scan(int mode) |
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{ |
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int i, old_async; |
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struct usb_device *dev; |
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if (mode == 1) |
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printf(" scanning bus for ethernet devices... "); |
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old_async = usb_disable_asynch(1); /* asynch transfer not allowed */ |
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for (i = 0; i < USB_MAX_ETH_DEV; i++) |
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memset(&usb_eth[i], 0, sizeof(usb_eth[i])); |
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for (i = 0; prob_dev[i].probe; i++) { |
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if (prob_dev[i].before_probe) |
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prob_dev[i].before_probe(); |
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} |
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usb_max_eth_dev = 0; |
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for (i = 0; i < USB_MAX_DEVICE; i++) { |
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dev = usb_get_dev_index(i); /* get device */ |
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debug("i=%d\n", i); |
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if (dev == NULL) |
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break; /* no more devices avaiable */ |
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/* find valid usb_ether driver for this device, if any */ |
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probe_valid_drivers(dev); |
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/* check limit */ |
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if (usb_max_eth_dev == USB_MAX_ETH_DEV) { |
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printf("max USB Ethernet Device reached: %d stopping\n", |
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usb_max_eth_dev); |
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break; |
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} |
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} /* for */ |
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usb_disable_asynch(old_async); /* restore asynch value */ |
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printf("%d Ethernet Device(s) found\n", usb_max_eth_dev); |
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if (usb_max_eth_dev > 0) |
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return 0; |
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return -1; |
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} |
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@ -0,0 +1,61 @@ |
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/*
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* Copyright (c) 2011 The Chromium OS Authors. |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#ifndef __USB_ETHER_H__ |
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#define __USB_ETHER_H__ |
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#include <net.h> |
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/*
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* IEEE 802.3 Ethernet magic constants. The frame sizes omit the preamble |
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* and FCS/CRC (frame check sequence). |
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*/ |
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#define ETH_ALEN 6 /* Octets in one ethernet addr */ |
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#define ETH_HLEN 14 /* Total octets in header. */ |
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#define ETH_ZLEN 60 /* Min. octets in frame sans FCS */ |
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#define ETH_DATA_LEN 1500 /* Max. octets in payload */ |
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#define ETH_FRAME_LEN PKTSIZE_ALIGN /* Max. octets in frame sans FCS */ |
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#define ETH_FCS_LEN 4 /* Octets in the FCS */ |
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struct ueth_data { |
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/* eth info */ |
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struct eth_device eth_dev; /* used with eth_register */ |
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int phy_id; /* mii phy id */ |
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/* usb info */ |
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struct usb_device *pusb_dev; /* this usb_device */ |
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unsigned char ifnum; /* interface number */ |
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unsigned char ep_in; /* in endpoint */ |
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unsigned char ep_out; /* out ....... */ |
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unsigned char ep_int; /* interrupt . */ |
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unsigned char subclass; /* as in overview */ |
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unsigned char protocol; /* .............. */ |
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unsigned char irqinterval; /* Intervall for IRQ Pipe */ |
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/* private fields for each driver can go here if needed */ |
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}; |
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/*
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* Function definitions for each USB ethernet driver go here, bracketed by |
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* #ifdef CONFIG_USB_ETHER_xxx...#endif |
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*/ |
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#endif /* __USB_ETHER_H__ */ |
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