[ecm] Add support for CDC-ECM USB Ethernet devices
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
parent
58c3e7f747
commit
1bb9e88ba0
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@ -21,8 +21,11 @@ FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <errno.h>
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#include <ipxe/netdevice.h>
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#include <ipxe/ethernet.h>
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#include <ipxe/if_ether.h>
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#include <ipxe/base16.h>
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#include <ipxe/profile.h>
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#include <ipxe/usb.h>
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#include "ecm.h"
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@ -32,6 +35,29 @@ FILE_LICENCE ( GPL2_OR_LATER );
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*
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*/
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/** Refill profiler */
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static struct profiler ecm_refill_profiler __profiler =
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{ .name = "ecm.refill" };
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/** Interrupt completion profiler */
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static struct profiler ecm_intr_profiler __profiler =
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{ .name = "ecm.intr" };
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/** Bulk IN completion profiler */
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static struct profiler ecm_in_profiler __profiler =
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{ .name = "ecm.in" };
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/** Bulk OUT profiler */
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static struct profiler ecm_out_profiler __profiler =
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{ .name = "ecm.out" };
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/******************************************************************************
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*
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* Ethernet functional descriptor
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*
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******************************************************************************
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*/
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/**
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* Locate Ethernet functional descriptor
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*
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@ -87,3 +113,634 @@ int ecm_fetch_mac ( struct usb_device *usb,
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return 0;
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}
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/******************************************************************************
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*
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* Ring management
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*
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******************************************************************************
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*/
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/**
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* Transcribe receive ring name (for debugging)
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*
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* @v ecm CDC-ECM device
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* @v ring Receive ring
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* @ret name Receive ring name
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*/
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static inline const char * ecm_rx_name ( struct ecm_device *ecm,
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struct ecm_rx_ring *ring ) {
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if ( ring == &ecm->intr ) {
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return "interrupt";
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} else if ( ring == &ecm->in ) {
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return "bulk IN";
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} else {
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return "UNKNOWN";
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}
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}
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/**
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* Refill receive ring
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*
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* @v ecm CDC-ECM device
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* @v ring Receive ring
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*/
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static void ecm_rx_refill ( struct ecm_device *ecm, struct ecm_rx_ring *ring ) {
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struct net_device *netdev = ecm->netdev;
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struct io_buffer *iobuf;
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int rc;
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/* Refill ring */
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while ( ring->fill < ring->max ) {
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/* Profile refill */
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profile_start ( &ecm_refill_profiler );
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/* Allocate I/O buffer */
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iobuf = alloc_iob ( ring->mtu );
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if ( ! iobuf ) {
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/* Wait for next refill */
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break;
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}
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iob_put ( iobuf, ring->mtu );
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/* Enqueue I/O buffer */
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if ( ( rc = usb_stream ( &ring->ep, iobuf, 0 ) ) != 0 ) {
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netdev_rx_err ( netdev, iob_disown ( iobuf ), rc );
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break;
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}
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/* Increment fill level */
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ring->fill++;
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profile_stop ( &ecm_refill_profiler );
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}
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}
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/******************************************************************************
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*
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* CDC-ECM communications interface
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*
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******************************************************************************
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*/
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/**
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* Complete interrupt transfer
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*
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* @v ep USB endpoint
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* @v iobuf I/O buffer
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* @v rc Completion status code
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*/
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static void ecm_intr_complete ( struct usb_endpoint *ep,
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struct io_buffer *iobuf, int rc ) {
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struct ecm_device *ecm = container_of ( ep, struct ecm_device, intr.ep);
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struct net_device *netdev = ecm->netdev;
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struct usb_setup_packet *message;
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size_t len = iob_len ( iobuf );
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/* Profile completions */
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profile_start ( &ecm_intr_profiler );
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/* Decrement fill level */
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assert ( ecm->intr.fill > 0 );
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ecm->intr.fill--;
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/* Ignore packets cancelled when the endpoint closes */
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if ( ! ep->open )
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goto ignore;
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/* Drop packets with errors */
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if ( rc != 0 ) {
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DBGC ( ecm, "ECM %p interrupt failed: %s\n",
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ecm, strerror ( rc ) );
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DBGC_HDA ( ecm, 0, iobuf->data, iob_len ( iobuf ) );
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goto error;
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}
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/* Extract message header */
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if ( len < sizeof ( *message ) ) {
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DBGC ( ecm, "ECM %p underlength interrupt:\n", ecm );
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DBGC_HDA ( ecm, 0, iobuf->data, iob_len ( iobuf ) );
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goto error;
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}
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message = iobuf->data;
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/* Parse message header */
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switch ( message->request ) {
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case cpu_to_le16 ( CDC_NETWORK_CONNECTION ) :
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if ( message->value && ! netdev_link_ok ( netdev ) ) {
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DBGC ( ecm, "ECM %p link up\n", ecm );
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netdev_link_up ( netdev );
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} else if ( netdev_link_ok ( netdev ) && ! message->value ) {
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DBGC ( ecm, "ECM %p link down\n", ecm );
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netdev_link_down ( netdev );
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}
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break;
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case cpu_to_le16 ( CDC_CONNECTION_SPEED_CHANGE ) :
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/* Ignore */
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break;
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default:
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DBGC ( ecm, "ECM %p unrecognised interrupt:\n", ecm );
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DBGC_HDA ( ecm, 0, iobuf->data, iob_len ( iobuf ) );
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goto error;
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}
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/* Free I/O buffer */
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free_iob ( iobuf );
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profile_stop ( &ecm_intr_profiler );
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return;
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error:
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netdev_rx_err ( netdev, iob_disown ( iobuf ), rc );
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ignore:
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free_iob ( iobuf );
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return;
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}
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/** Interrupt endpoint operations */
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static struct usb_endpoint_driver_operations ecm_intr_operations = {
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.complete = ecm_intr_complete,
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};
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/**
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* Open communications interface
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*
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* @v ecm CDC-ECM device
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* @ret rc Return status code
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*/
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static int ecm_comms_open ( struct ecm_device *ecm ) {
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int rc;
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/* Open interrupt endpoint */
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if ( ( rc = usb_endpoint_open ( &ecm->intr.ep ) ) != 0 ) {
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DBGC ( ecm, "ECM %p could not open interrupt: %s\n",
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ecm, strerror ( rc ) );
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goto err_open;
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}
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/* Refill interrupt ring */
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ecm_rx_refill ( ecm, &ecm->intr );
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return 0;
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usb_endpoint_close ( &ecm->intr.ep );
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assert ( ecm->intr.fill == 0 );
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err_open:
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return rc;
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}
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/**
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* Close communications interface
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*
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* @v ecm CDC-ECM device
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*/
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static void ecm_comms_close ( struct ecm_device *ecm ) {
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/* Close interrupt endpoint */
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usb_endpoint_close ( &ecm->intr.ep );
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assert ( ecm->intr.fill == 0 );
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}
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/******************************************************************************
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*
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* CDC-ECM data interface
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*
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******************************************************************************
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*/
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/**
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* Complete bulk IN transfer
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*
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* @v ep USB endpoint
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* @v iobuf I/O buffer
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* @v rc Completion status code
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*/
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static void ecm_in_complete ( struct usb_endpoint *ep, struct io_buffer *iobuf,
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int rc ) {
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struct ecm_device *ecm = container_of ( ep, struct ecm_device, in.ep );
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struct net_device *netdev = ecm->netdev;
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/* Profile receive completions */
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profile_start ( &ecm_in_profiler );
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/* Decrement fill level */
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assert ( ecm->in.fill > 0 );
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ecm->in.fill--;
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/* Ignore packets cancelled when the endpoint closes */
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if ( ! ep->open )
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goto ignore;
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/* Record USB errors against the network device */
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if ( rc != 0 ) {
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DBGC ( ecm, "ECM %p bulk IN failed: %s\n",
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ecm, strerror ( rc ) );
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goto error;
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}
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/* Hand off to network stack */
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netdev_rx ( netdev, iob_disown ( iobuf ) );
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profile_stop ( &ecm_in_profiler );
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return;
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error:
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netdev_rx_err ( netdev, iob_disown ( iobuf ), rc );
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ignore:
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free_iob ( iobuf );
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}
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/** Bulk IN endpoint operations */
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static struct usb_endpoint_driver_operations ecm_in_operations = {
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.complete = ecm_in_complete,
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};
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/**
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* Transmit packet
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*
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* @v ecm CDC-ECM device
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* @v iobuf I/O buffer
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* @ret rc Return status code
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*/
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static int ecm_out_transmit ( struct ecm_device *ecm,
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struct io_buffer *iobuf ) {
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int rc;
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/* Profile transmissions */
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profile_start ( &ecm_out_profiler );
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/* Enqueue I/O buffer */
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if ( ( rc = usb_stream ( &ecm->out.ep, iobuf, 1 ) ) != 0 )
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return rc;
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profile_stop ( &ecm_out_profiler );
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return 0;
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}
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/**
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* Complete bulk OUT transfer
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*
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* @v ep USB endpoint
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* @v iobuf I/O buffer
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* @v rc Completion status code
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*/
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static void ecm_out_complete ( struct usb_endpoint *ep, struct io_buffer *iobuf,
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int rc ) {
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struct ecm_device *ecm = container_of ( ep, struct ecm_device, out.ep );
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struct net_device *netdev = ecm->netdev;
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/* Report TX completion */
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netdev_tx_complete_err ( netdev, iobuf, rc );
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}
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/** Bulk OUT endpoint operations */
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static struct usb_endpoint_driver_operations ecm_out_operations = {
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.complete = ecm_out_complete,
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};
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/**
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* Open data interface
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*
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* @v ecm CDC-ECM device
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* @ret rc Return status code
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*/
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static int ecm_data_open ( struct ecm_device *ecm ) {
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struct usb_device *usb = ecm->usb;
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int rc;
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/* Select alternate setting for data interface */
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if ( ( rc = usb_set_interface ( usb, ecm->data,
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ECM_DATA_ALTERNATE ) ) != 0 ) {
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DBGC ( ecm, "ECM %p could not set alternate interface: %s\n",
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ecm, strerror ( rc ) );
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goto err_set_interface;
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}
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/* Open bulk IN endpoint */
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if ( ( rc = usb_endpoint_open ( &ecm->in.ep ) ) != 0 ) {
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DBGC ( ecm, "ECM %p could not open bulk IN: %s\n",
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ecm, strerror ( rc ) );
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goto err_open_in;
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}
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/* Open bulk OUT endpoint */
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if ( ( rc = usb_endpoint_open ( &ecm->out.ep ) ) != 0 ) {
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DBGC ( ecm, "ECM %p could not open bulk OUT: %s\n",
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ecm, strerror ( rc ) );
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goto err_open_out;
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}
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/* Refill bulk IN ring */
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ecm_rx_refill ( ecm, &ecm->in );
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return 0;
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usb_endpoint_close ( &ecm->out.ep );
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err_open_out:
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usb_endpoint_close ( &ecm->in.ep );
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assert ( ecm->in.fill == 0 );
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err_open_in:
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usb_set_interface ( usb, ecm->data, 0 );
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err_set_interface:
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return rc;
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}
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/**
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* Close data interface
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*
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* @v ecm CDC-ECM device
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*/
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static void ecm_data_close ( struct ecm_device *ecm ) {
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struct usb_device *usb = ecm->usb;
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/* Close endpoints */
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usb_endpoint_close ( &ecm->out.ep );
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usb_endpoint_close ( &ecm->in.ep );
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assert ( ecm->in.fill == 0 );
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/* Reset data interface */
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usb_set_interface ( usb, ecm->data, 0 );
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}
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/******************************************************************************
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*
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* Network device interface
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*
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******************************************************************************
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*/
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/**
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* Open network device
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*
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* @v netdev Network device
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* @ret rc Return status code
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*/
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static int ecm_open ( struct net_device *netdev ) {
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struct ecm_device *ecm = netdev->priv;
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struct usb_device *usb = ecm->usb;
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unsigned int filter;
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int rc;
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/* Open communications interface */
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if ( ( rc = ecm_comms_open ( ecm ) ) != 0 )
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goto err_comms_open;
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/* Open data interface */
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if ( ( rc = ecm_data_open ( ecm ) ) != 0 )
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goto err_data_open;
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/* Set packet filter */
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filter = ( ECM_PACKET_TYPE_PROMISCUOUS |
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ECM_PACKET_TYPE_ALL_MULTICAST |
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ECM_PACKET_TYPE_DIRECTED |
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ECM_PACKET_TYPE_BROADCAST );
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if ( ( rc = usb_control ( usb, ECM_SET_ETHERNET_PACKET_FILTER,
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filter, ecm->comms, NULL, 0 ) ) != 0 ) {
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DBGC ( ecm, "ECM %p could not set packet filter: %s\n",
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ecm, strerror ( rc ) );
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goto err_set_filter;
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}
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return 0;
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err_set_filter:
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ecm_data_close ( ecm );
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err_data_open:
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ecm_comms_close ( ecm );
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err_comms_open:
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return rc;
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}
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/**
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* Close network device
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*
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* @v netdev Network device
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*/
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static void ecm_close ( struct net_device *netdev ) {
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struct ecm_device *ecm = netdev->priv;
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/* Close data interface */
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ecm_data_close ( ecm );
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/* Close communications interface */
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ecm_comms_close ( ecm );
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}
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/**
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* Transmit packet
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*
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* @v netdev Network device
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* @v iobuf I/O buffer
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* @ret rc Return status code
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*/
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static int ecm_transmit ( struct net_device *netdev,
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struct io_buffer *iobuf ) {
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struct ecm_device *ecm = netdev->priv;
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int rc;
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/* Transmit packet */
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if ( ( rc = ecm_out_transmit ( ecm, iobuf ) ) != 0 )
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return rc;
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return 0;
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}
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/**
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* Poll for completed and received packets
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*
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* @v netdev Network device
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*/
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static void ecm_poll ( struct net_device *netdev ) {
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struct ecm_device *ecm = netdev->priv;
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/* Poll USB bus */
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usb_poll ( ecm->bus );
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/* Refill interrupt ring */
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ecm_rx_refill ( ecm, &ecm->intr );
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/* Refill bulk IN ring */
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ecm_rx_refill ( ecm, &ecm->in );
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}
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/** CDC-ECM network device operations */
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static struct net_device_operations ecm_operations = {
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.open = ecm_open,
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.close = ecm_close,
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.transmit = ecm_transmit,
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.poll = ecm_poll,
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};
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/******************************************************************************
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*
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* USB interface
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*
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******************************************************************************
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*/
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/**
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* Probe device
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*
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* @v func USB function
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* @v config Configuration descriptor
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* @ret rc Return status code
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*/
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static int ecm_probe ( struct usb_function *func,
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struct usb_configuration_descriptor *config ) {
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struct usb_device *usb = func->usb;
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struct net_device *netdev;
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struct ecm_device *ecm;
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struct usb_interface_descriptor *comms;
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struct usb_interface_descriptor *data;
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struct ecm_ethernet_descriptor *ethernet;
|
||||
int rc;
|
||||
|
||||
/* Allocate and initialise structure */
|
||||
netdev = alloc_etherdev ( sizeof ( *ecm ) );
|
||||
if ( ! netdev ) {
|
||||
rc = -ENOMEM;
|
||||
goto err_alloc;
|
||||
}
|
||||
netdev_init ( netdev, &ecm_operations );
|
||||
netdev->dev = &func->dev;
|
||||
ecm = netdev->priv;
|
||||
memset ( ecm, 0, sizeof ( *ecm ) );
|
||||
ecm->usb = usb;
|
||||
ecm->bus = usb->port->hub->bus;
|
||||
ecm->netdev = netdev;
|
||||
usb_endpoint_init ( &ecm->intr.ep, usb, &ecm_intr_operations );
|
||||
usb_endpoint_init ( &ecm->in.ep, usb, &ecm_in_operations );
|
||||
usb_endpoint_init ( &ecm->out.ep, usb, &ecm_out_operations );
|
||||
DBGC ( ecm, "ECM %p on %s\n", ecm, func->name );
|
||||
|
||||
/* Identify interfaces */
|
||||
if ( func->count < ECM_INTERFACE_COUNT ) {
|
||||
DBGC ( ecm, "ECM %p has only %d interfaces\n",
|
||||
ecm, func->count );
|
||||
rc = -EINVAL;
|
||||
goto err_count;
|
||||
}
|
||||
ecm->comms = func->interface[ECM_INTERFACE_COMMS];
|
||||
ecm->data = func->interface[ECM_INTERFACE_DATA];
|
||||
|
||||
/* Locate communications interface descriptor */
|
||||
comms = usb_interface_descriptor ( config, ecm->comms, 0 );
|
||||
if ( ! comms ) {
|
||||
DBGC ( ecm, "ECM %p has no communications interface\n", ecm );
|
||||
rc = -EINVAL;
|
||||
goto err_comms;
|
||||
}
|
||||
|
||||
/* Locate data interface descriptor */
|
||||
data = usb_interface_descriptor ( config, ecm->data,
|
||||
ECM_DATA_ALTERNATE );
|
||||
if ( ! data ) {
|
||||
DBGC ( ecm, "ECM %p has no data interface\n", ecm );
|
||||
rc = -EINVAL;
|
||||
goto err_data;
|
||||
}
|
||||
|
||||
/* Describe interrupt endpoint */
|
||||
if ( ( rc = usb_endpoint_described ( &ecm->intr.ep, config, comms,
|
||||
USB_INTERRUPT, 0 ) ) != 0 ) {
|
||||
DBGC ( ecm, "ECM %p could not describe interrupt endpoint: "
|
||||
"%s\n", ecm, strerror ( rc ) );
|
||||
goto err_interrupt;
|
||||
}
|
||||
ecm->intr.mtu = ecm->intr.ep.mtu;
|
||||
ecm->intr.max = ECM_INTR_MAX_FILL;
|
||||
|
||||
/* Describe bulk IN endpoint */
|
||||
if ( ( rc = usb_endpoint_described ( &ecm->in.ep, config, data,
|
||||
USB_BULK_IN, 0 ) ) != 0 ) {
|
||||
DBGC ( ecm, "ECM %p could not describe bulk IN endpoint: "
|
||||
"%s\n", ecm, strerror ( rc ) );
|
||||
goto err_bulk_in;
|
||||
}
|
||||
ecm->in.mtu = ECM_IN_MTU;
|
||||
ecm->in.max = ECM_IN_MAX_FILL;
|
||||
|
||||
/* Describe bulk OUT endpoint */
|
||||
if ( ( rc = usb_endpoint_described ( &ecm->out.ep, config, data,
|
||||
USB_BULK_OUT, 0 ) ) != 0 ) {
|
||||
DBGC ( ecm, "ECM %p could not describe bulk OUT endpoint: "
|
||||
"%s\n", ecm, strerror ( rc ) );
|
||||
goto err_bulk_out;
|
||||
}
|
||||
|
||||
/* Locate Ethernet descriptor */
|
||||
ethernet = ecm_ethernet_descriptor ( config, comms );
|
||||
if ( ! ethernet ) {
|
||||
DBGC ( ecm, "ECM %p has no Ethernet descriptor\n", ecm );
|
||||
rc = -EINVAL;
|
||||
goto err_ethernet;
|
||||
}
|
||||
|
||||
/* Fetch MAC address */
|
||||
if ( ( rc = ecm_fetch_mac ( usb, ethernet, netdev->hw_addr ) ) != 0 ) {
|
||||
DBGC ( ecm, "ECM %p could not fetch MAC address: %s\n",
|
||||
ecm, strerror ( rc ) );
|
||||
goto err_fetch_mac;
|
||||
}
|
||||
|
||||
/* Register network device */
|
||||
if ( ( rc = register_netdev ( netdev ) ) != 0 )
|
||||
goto err_register;
|
||||
|
||||
usb_func_set_drvdata ( func, ecm );
|
||||
return 0;
|
||||
|
||||
unregister_netdev ( netdev );
|
||||
err_register:
|
||||
err_fetch_mac:
|
||||
err_ethernet:
|
||||
err_bulk_out:
|
||||
err_bulk_in:
|
||||
err_interrupt:
|
||||
err_data:
|
||||
err_comms:
|
||||
err_count:
|
||||
netdev_nullify ( netdev );
|
||||
netdev_put ( netdev );
|
||||
err_alloc:
|
||||
return rc;
|
||||
}
|
||||
|
||||
/**
|
||||
* Remove device
|
||||
*
|
||||
* @v func USB function
|
||||
*/
|
||||
static void ecm_remove ( struct usb_function *func ) {
|
||||
struct ecm_device *ecm = usb_func_get_drvdata ( func );
|
||||
struct net_device *netdev = ecm->netdev;
|
||||
|
||||
unregister_netdev ( netdev );
|
||||
netdev_nullify ( netdev );
|
||||
netdev_put ( netdev );
|
||||
}
|
||||
|
||||
/** CDC-ECM device IDs */
|
||||
static struct usb_device_id ecm_ids[] = {
|
||||
{
|
||||
.name = "cdc-ecm",
|
||||
.vendor = USB_ANY_ID,
|
||||
.product = USB_ANY_ID,
|
||||
.class = {
|
||||
.class = USB_CLASS_CDC,
|
||||
.subclass = USB_SUBCLASS_CDC_ECM,
|
||||
.protocol = 0,
|
||||
},
|
||||
},
|
||||
};
|
||||
|
||||
/** CDC-ECM driver */
|
||||
struct usb_driver ecm_driver __usb_driver = {
|
||||
.ids = ecm_ids,
|
||||
.id_count = ( sizeof ( ecm_ids ) / sizeof ( ecm_ids[0] ) ),
|
||||
.probe = ecm_probe,
|
||||
.remove = ecm_remove,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -12,13 +12,47 @@ FILE_LICENCE ( GPL2_OR_LATER );
|
|||
#include <ipxe/usb.h>
|
||||
#include <ipxe/cdc.h>
|
||||
|
||||
/** CDC-ECM subclass */
|
||||
#define USB_SUBCLASS_CDC_ECM 0x06
|
||||
|
||||
/** CDC-ECM interfaces */
|
||||
enum ecm_interfaces {
|
||||
/** Communications interface */
|
||||
ECM_INTERFACE_COMMS = 0,
|
||||
/** Data interface */
|
||||
ECM_INTERFACE_DATA,
|
||||
ECM_INTERFACE_COUNT
|
||||
};
|
||||
|
||||
/** Alternate setting for CDC-ECM data interface */
|
||||
#define ECM_DATA_ALTERNATE 1
|
||||
|
||||
/** Set Ethernet packet filter */
|
||||
#define ECM_SET_ETHERNET_PACKET_FILTER \
|
||||
( USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE | \
|
||||
USB_REQUEST_TYPE ( 0x43 ) )
|
||||
|
||||
/** Ethernet packet types */
|
||||
enum ecm_ethernet_packet_filter {
|
||||
/** Promiscuous mode */
|
||||
ECM_PACKET_TYPE_PROMISCUOUS = 0x0001,
|
||||
/** All multicast packets */
|
||||
ECM_PACKET_TYPE_ALL_MULTICAST = 0x0002,
|
||||
/** Unicast packets */
|
||||
ECM_PACKET_TYPE_DIRECTED = 0x0004,
|
||||
/** Broadcast packets */
|
||||
ECM_PACKET_TYPE_BROADCAST = 0x0008,
|
||||
/** Specified multicast packets */
|
||||
ECM_PACKET_TYPE_MULTICAST = 0x0010,
|
||||
};
|
||||
|
||||
/** An Ethernet Functional Descriptor */
|
||||
struct ecm_ethernet_descriptor {
|
||||
/** Descriptor header */
|
||||
struct usb_descriptor_header header;
|
||||
/** Descriptor subtype */
|
||||
uint8_t subtype;
|
||||
/** MAC addres string */
|
||||
/** MAC address string */
|
||||
uint8_t mac;
|
||||
/** Ethernet statistics bitmap */
|
||||
uint32_t statistics;
|
||||
|
|
@ -30,6 +64,64 @@ struct ecm_ethernet_descriptor {
|
|||
uint8_t wol;
|
||||
} __attribute__ (( packed ));
|
||||
|
||||
/** A CDC-ECM receive ring */
|
||||
struct ecm_rx_ring {
|
||||
/** USB endpoint */
|
||||
struct usb_endpoint ep;
|
||||
/** I/O buffer size */
|
||||
size_t mtu;
|
||||
/** Fill level */
|
||||
unsigned int fill;
|
||||
/** Maximum fill level */
|
||||
unsigned int max;
|
||||
};
|
||||
|
||||
/** A CDC-ECM transmit ring */
|
||||
struct ecm_tx_ring {
|
||||
/** USB endpoint */
|
||||
struct usb_endpoint ep;
|
||||
};
|
||||
|
||||
/** A CDC-ECM network device */
|
||||
struct ecm_device {
|
||||
/** USB device */
|
||||
struct usb_device *usb;
|
||||
/** USB bus */
|
||||
struct usb_bus *bus;
|
||||
/** Network device */
|
||||
struct net_device *netdev;
|
||||
|
||||
/** Communications interface */
|
||||
unsigned int comms;
|
||||
/** Data interface */
|
||||
unsigned int data;
|
||||
|
||||
/** Interrupt ring */
|
||||
struct ecm_rx_ring intr;
|
||||
/** Bulk IN ring */
|
||||
struct ecm_rx_ring in;
|
||||
/** Bulk OUT ring */
|
||||
struct ecm_tx_ring out;
|
||||
};
|
||||
|
||||
/** Interrupt maximum fill level
|
||||
*
|
||||
* This is a policy decision.
|
||||
*/
|
||||
#define ECM_INTR_MAX_FILL 2
|
||||
|
||||
/** Bulk IN maximum fill level
|
||||
*
|
||||
* This is a policy decision.
|
||||
*/
|
||||
#define ECM_IN_MAX_FILL 8
|
||||
|
||||
/** Bulk IN buffer size
|
||||
*
|
||||
* This is a policy decision.
|
||||
*/
|
||||
#define ECM_IN_MTU ( ETH_FRAME_LEN + 4 /* possible VLAN header */ )
|
||||
|
||||
extern struct ecm_ethernet_descriptor *
|
||||
ecm_ethernet_descriptor ( struct usb_configuration_descriptor *config,
|
||||
struct usb_interface_descriptor *interface );
|
||||
|
|
|
|||
Reference in New Issue