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[usb] Allow for USB network devices with no interrupt endpoint 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/64/head
Michael Brown 2017-05-18 15:18:25 +01:00
parent 84e25513b1
commit 63113f591f
2 changed files with 34 additions and 14 deletions
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34
src/drivers/usb/usbnet.c
View File

@ -35,11 +35,11 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
* USB network devices use a variety of packet formats and interface
* descriptors, but tend to have several features in common:
*
* - a single interrupt endpoint using the generic refill mechanism
* - a single bulk OUT endpoint
*
* - a single bulk IN endpoint using the generic refill mechanism
*
* - a single bulk OUT endpoint
* - an optional interrupt endpoint using the generic refill mechanism
*
* - optional use of an alternate setting to enable the data interface
*
@ -55,15 +55,17 @@ int usbnet_open ( struct usbnet_device *usbnet ) {
struct usb_device *usb = usbnet->func->usb;
int rc;
/* Open interrupt endpoint */
if ( ( rc = usb_endpoint_open ( &usbnet->intr ) ) != 0 ) {
/* Open interrupt endpoint, if applicable */
if ( usbnet_has_intr ( usbnet ) &&
( rc = usb_endpoint_open ( &usbnet->intr ) ) != 0 ) {
DBGC ( usbnet, "USBNET %s could not open interrupt: %s\n",
usbnet->func->name, strerror ( rc ) );
goto err_open_intr;
}
/* Refill interrupt endpoint */
if ( ( rc = usb_refill ( &usbnet->intr ) ) != 0 ) {
/* Refill interrupt endpoint, if applicable */
if ( usbnet_has_intr ( usbnet ) &&
( rc = usb_refill ( &usbnet->intr ) ) != 0 ) {
DBGC ( usbnet, "USBNET %s could not refill interrupt: %s\n",
usbnet->func->name, strerror ( rc ) );
goto err_refill_intr;
@ -111,7 +113,8 @@ int usbnet_open ( struct usbnet_device *usbnet ) {
usb_set_interface ( usb, usbnet->data, 0 );
err_set_interface:
err_refill_intr:
usb_endpoint_close ( &usbnet->intr );
if ( usbnet_has_intr ( usbnet ) )
usb_endpoint_close ( &usbnet->intr );
err_open_intr:
return rc;
}
@ -134,8 +137,9 @@ void usbnet_close ( struct usbnet_device *usbnet ) {
if ( usbnet->alternate )
usb_set_interface ( usb, usbnet->data, 0 );
/* Close interrupt endpoint */
usb_endpoint_close ( &usbnet->intr );
/* Close interrupt endpoint, if applicable */
if ( usbnet_has_intr ( usbnet ) )
usb_endpoint_close ( &usbnet->intr );
}
/**
@ -151,9 +155,11 @@ int usbnet_refill ( struct usbnet_device *usbnet ) {
if ( ( rc = usb_refill ( &usbnet->in ) ) != 0 )
return rc;
/* Refill interrupt endpoint */
if ( ( rc = usb_refill ( &usbnet->intr ) ) != 0 )
/* Refill interrupt endpoint, if applicable */
if ( usbnet_has_intr ( usbnet ) &&
( rc = usb_refill ( &usbnet->intr ) ) != 0 ) {
return rc;
}
return 0;
}
@ -272,9 +278,11 @@ int usbnet_describe ( struct usbnet_device *usbnet,
struct usb_configuration_descriptor *config ) {
int rc;
/* Describe communications interface */
if ( ( rc = usbnet_comms_describe ( usbnet, config ) ) != 0 )
/* Describe communications interface, if applicable */
if ( usbnet_has_intr ( usbnet ) &&
( rc = usbnet_comms_describe ( usbnet, config ) ) != 0 ) {
return rc;
}
/* Describe data interface */
if ( ( rc = usbnet_data_describe ( usbnet, config ) ) != 0 )

14
src/include/ipxe/usbnet.h
View File

@ -36,7 +36,7 @@ struct usbnet_device {
*
* @v usbnet USB network device
* @v func USB function
* @v intr Interrupt endpoint operations
* @v intr Interrupt endpoint operations, or NULL
* @v in Bulk IN endpoint operations
* @v out Bulk OUT endpoint operations
*/
@ -53,6 +53,18 @@ usbnet_init ( struct usbnet_device *usbnet, struct usb_function *func,
usb_endpoint_init ( &usbnet->out, usb, out );
}
/**
* Check if USB network device has an interrupt endpoint
*
* @v usbnet USB network device
* @ret has_intr Device has an interrupt endpoint
*/
static inline __attribute__ (( always_inline )) int
usbnet_has_intr ( struct usbnet_device *usbnet ) {
return ( usbnet->intr.driver != NULL );
}
extern int usbnet_open ( struct usbnet_device *usbnet );
extern void usbnet_close ( struct usbnet_device *usbnet );
extern int usbnet_refill ( struct usbnet_device *usbnet );