u-boot.git/drivers/usb/gadget/ether.c, branch v2011.09

USB-RNDIS: Send RNDIS state on disconnecting

2011-02-19T19:32:38+00:00

Add waiting for receiving Ethernet gadget state on the Windows host
side before dropping pullup, but keep it for debug.

Signed-off-by: Vitaly Kuzmichev

USB: Add USB RNDIS gadget protocol

2011-02-19T19:32:37+00:00

Port USB gadget RNDIS protocol support from linux-2.6.26
(.27 gadget stack actually has composite drivers).

Signed-off-by: Vitaly Kuzmichev

USB-CDC: Move struct declaration before its use

2011-02-19T19:32:37+00:00

Signed-off-by: Vitaly Kuzmichev

USB-CDC: Port struct net_device_stats

2011-02-19T19:32:37+00:00

Port struct net_device_stats and statistics collecting needed for
RNDIS protocol.

Signed-off-by: Vitaly Kuzmichev

USB-CDC: handle interrupt after dropped pullup

2011-02-19T19:32:36+00:00

Disconnecting USB gadget with pending interrupt may cause its wrong
handling in the next time when interface will be started again
(especially actual for RNDIS). This interrupt may force the gadget
to queue unexpected response before setup stage.
Despite the fact that such interrupt handled after dropped pullup
also may add pending response, this will not bring to any issues due to
usb_ep_disable (which clears the queue) called on gadget unregistering.

Signed-off-by: Vitaly Kuzmichev

USB-CDC: Move MAC addresses setting into usb_eth_init

2011-01-19T16:29:55+00:00

This allows to change device and host MAC addresses without performing
reset.

Signed-off-by: Vitaly Kuzmichev

USB-CDC: Do not rename netdev after its registration

2011-01-19T16:29:55+00:00

Calling eth_bind at usb_eth_init time causes renaming of the network
device from 'usb_ether' to 'usb0'. Fixing this to keep the first name.

Signed-off-by: Vitaly Kuzmichev

usb_ether: register usb ethernet gadget at each eth init

2011-01-19T16:29:55+00:00

Since the ether may not be the only one usb gadget would be used
in the uboot, it is neccessary to do the register each time the
eth begin to work to make usb gadget driver less confussed when
we want to use two different usb gadget at the same time.

Usb gadget driver could simple ignore the register operation, if
it find the driver has been registered already.

Signed-off-by: Lei Wen

Coding Style cleanup

2010-10-27T20:48:30+00:00

Signed-off-by: Wolfgang Denk

USB-CDC: Prevent rx_req being enqueued twice

2010-10-13T10:07:58+00:00

After gadget reinitializaton (after tftp has been done once)
packet_received may become equal to 1 due to nuking OUT_EP
while disabling it in eth_reset_config.

rx_submit called from usb_eth_init queues rx_req first time.
But the first call of usb_eth_recv from NetLoop queues rx_req
again due to packet_received = 1.

The following flow shows the path of functions calls when
this happens:

 net/net.c:NetLoop
 |
 +-net/eth.c:eth_init
 |   ether.c:usb_eth_init
 |   |
 |   +-udc_driver:usb_gadget_handle_interrupts
 |   |   udc_driver:...
 |   |     ether.c:eth_setup
 |   |       ether.c:eth_set_config
 |   |         ether.c:eth_reset_config
 |   |           udc_driver:usb_ep_disable
 |   |             udc_driver:nuke
 |   |               ether.c:rx_complete
 |   |                 ether.c: packet_received = 1;
 |   |
 |   +-ether.c:rx_submit
 |       udc_driver:usb_ep_queue --- The first time when rx_req is queued
 |
 +-net/eth.c:eth_rx
     ether.c:usb_eth_recv
     |
     +-udc_driver:usb_gadget_handle_interrupts
     |   udc_driver:... --- no interrupts, returning
     +-ether.c: if (packet_received) { ...
         ether.c:rx_submit
           udc_driver:usb_ep_queue --- The second time!

Signed-off-by: Vitaly Kuzmichev