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Add USB host ethernet adapter support 

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>
This commit is contained in:
Simon Glass 2011-02-16 11:14:33 -08:00 committed by Remy Bohmer
parent 96820a3587
commit 89d48367ed
9 changed files with 298 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Makefile
View File

@ -235,6 +235,7 @@ endif
LIBS += drivers/rtc/librtc.o
LIBS += drivers/serial/libserial.o
LIBS += drivers/twserial/libtws.o
LIBS += drivers/usb/eth/libusb_eth.a
LIBS += drivers/usb/gadget/libusb_gadget.o
LIBS += drivers/usb/host/libusb_host.o
LIBS += drivers/usb/musb/libusb_musb.o

12
common/cmd_usb.c
View File

@ -34,6 +34,9 @@
#ifdef CONFIG_USB_STORAGE
static int usb_stor_curr_dev = -1; /* current device */
#endif
#ifdef CONFIG_USB_HOST_ETHER
static int usb_ether_curr_dev = -1; /* current ethernet device */
#endif
/* some display routines (info command) */
char *usb_get_class_desc(unsigned char dclass)
@ -522,11 +525,16 @@ int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
usb_stop();
printf("(Re)start USB...\n");
i = usb_init();
if (i >= 0) {
#ifdef CONFIG_USB_STORAGE
/* try to recognize storage devices immediately */
if (i >= 0)
/* try to recognize storage devices immediately */
usb_stor_curr_dev = usb_stor_scan(1);
#endif
#ifdef CONFIG_USB_HOST_ETHER
/* try to recognize ethernet devices immediately */
usb_ether_curr_dev = usb_host_eth_scan(1);
#endif
}
return 0;
}
if (strncmp(argv[1], "stop", 4) == 0) {

6
common/usb.c
View File

@ -145,10 +145,14 @@ int usb_stop(void)
/*
* disables the asynch behaviour of the control message. This is used for data
* transfers that uses the exclusiv access to the control and bulk messages.
* Returns the old value so it can be restored later.
*/
void usb_disable_asynch(int disable)
int usb_disable_asynch(int disable)
{
int old_value = asynch_allowed;
asynch_allowed = !disable;
return old_value;
}

4
doc/README.usb
View File

@ -28,7 +28,8 @@ USB Support for PIP405 and MIP405 (UHCI)
The USB support is implemented on the base of the UHCI Host
controller.
Currently supported are USB Hubs, USB Keyboards and USB Floppys.
Currently supported are USB Hubs, USB Keyboards, USB Floppys, USB
flash sticks and USB network adaptors.
Tested with a TEAC Floppy TEAC FD-05PUB and Chicony KU-8933 Keyboard.
How it works:
@ -78,3 +79,4 @@ CONFIG_USB_UHCI defines the lowlevel part.A lowlevel part must be defined
if using CONFIG_CMD_USB
CONFIG_USB_KEYBOARD enables the USB Keyboard
CONFIG_USB_STORAGE enables the USB storage devices
CONFIG_USB_HOST_ETHER enables USB ethernet dongle support

45
drivers/usb/eth/Makefile Normal file
View File

@ -0,0 +1,45 @@
#
# 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 $(TOPDIR)/config.mk
LIB := $(obj)libusb_eth.a
# new USB host ethernet layer dependencies
COBJS-$(CONFIG_USB_HOST_ETHER) += usb_ether.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))
all: $(LIB)
$(LIB): $(obj).depend $(OBJS)
$(AR) $(ARFLAGS) $@ $(OBJS)
#########################################################################
# defines $(obj).depend target
include $(SRCTREE)/rules.mk
sinclude $(obj).depend
#########################################################################

143
drivers/usb/eth/usb_ether.c Normal file
View File

@ -0,0 +1,143 @@
/*
* 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[] = {
{ }, /* 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;
}

9
include/usb.h
View File

@ -168,6 +168,13 @@ int usb_stor_info(void);
#endif
#ifdef CONFIG_USB_HOST_ETHER
#define USB_MAX_ETH_DEV 5
int usb_host_eth_scan(int mode);
#endif
#ifdef CONFIG_USB_KEYBOARD
int drv_usb_kbd_init(void);
@ -191,7 +198,7 @@ int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
void *data, int len, int *actual_length, int timeout);
int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
void *buffer, int transfer_len, int interval);
void usb_disable_asynch(int disable);
int usb_disable_asynch(int disable);
int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
inline void wait_ms(unsigned long ms);
int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,

61
include/usb_ether.h Normal file
View File

@ -0,0 +1,61 @@
/*
* 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
*/
#ifndef __USB_ETHER_H__
#define __USB_ETHER_H__
#include <net.h>
/*
* IEEE 802.3 Ethernet magic constants. The frame sizes omit the preamble
* and FCS/CRC (frame check sequence).
*/
#define ETH_ALEN 6 /* Octets in one ethernet addr */
#define ETH_HLEN 14 /* Total octets in header. */
#define ETH_ZLEN 60 /* Min. octets in frame sans FCS */
#define ETH_DATA_LEN 1500 /* Max. octets in payload */
#define ETH_FRAME_LEN PKTSIZE_ALIGN /* Max. octets in frame sans FCS */
#define ETH_FCS_LEN 4 /* Octets in the FCS */
struct ueth_data {
/* eth info */
struct eth_device eth_dev; /* used with eth_register */
int phy_id; /* mii phy id */
/* usb info */
struct usb_device *pusb_dev; /* this usb_device */
unsigned char ifnum; /* interface number */
unsigned char ep_in; /* in endpoint */
unsigned char ep_out; /* out ....... */
unsigned char ep_int; /* interrupt . */
unsigned char subclass; /* as in overview */
unsigned char protocol; /* .............. */
unsigned char irqinterval; /* Intervall for IRQ Pipe */
/* private fields for each driver can go here if needed */
};
/*
* Function definitions for each USB ethernet driver go here, bracketed by
* #ifdef CONFIG_USB_ETHER_xxx...#endif
*/
#endif /* __USB_ETHER_H__ */

41
net/eth.c
View File

@ -166,20 +166,33 @@ int eth_get_dev_index (void)
return (0);
}
int eth_register(struct eth_device* dev)
static void eth_current_changed(void)
{
struct eth_device *d;
if (!eth_devices) {
eth_current = eth_devices = dev;
#ifdef CONFIG_NET_MULTI
{
char *act = getenv("ethact");
/* update current ethernet name */
if (eth_current)
{
char *act = getenv("ethact");
if (act == NULL || strcmp(act, eth_current->name) != 0)
setenv("ethact", eth_current->name);
}
/*
* remove the variable completely if there is no active
* interface
*/
else if (act != NULL)
setenv("ethact", NULL);
}
#endif
}
int eth_register(struct eth_device *dev)
{
struct eth_device *d;
if (!eth_devices) {
eth_current = eth_devices = dev;
eth_current_changed();
} else {
for (d=eth_devices; d->next!=eth_devices; d=d->next)
;
@ -271,14 +284,7 @@ int eth_initialize(bd_t *bis)
dev = dev->next;
} while(dev != eth_devices);
/* update current ethernet name */
if (eth_current) {
char *act = getenv("ethact");
if (act == NULL || strcmp(act, eth_current->name) != 0)
setenv("ethact", eth_current->name);
} else
setenv("ethact", NULL);
eth_current_changed();
putc ('\n');
}
@ -466,10 +472,7 @@ void eth_try_another(int first_restart)
eth_current = eth_current->next;
/* update current ethernet name */
act = getenv("ethact");
if (act == NULL || strcmp(act, eth_current->name) != 0)
setenv("ethact", eth_current->name);
eth_current_changed();
if (first_failed == eth_current) {
NetRestartWrap = 1;
@ -500,7 +503,7 @@ void eth_set_current(void)
} while (old_current != eth_current);
}
setenv("ethact", eth_current->name);
eth_current_changed();
}
char *eth_get_name (void)