[PATCH] USBATM: allow isochronous transfer
While the usbatm core has had some support for using isoc urbs
for some time, there was no way for users to turn it on. While
use of isoc transfer should still be considered experimental, it
now works well enough to let users turn it on. Minidrivers signal
to the core that they want to use isoc transfer by setting the new
UDSL_USE_ISOC flag. The speedtch minidriver gets a new module
parameter enable_isoc (defaults to false), plus some logic that
checks for the existence of an isoc receive endpoint (not all
speedtouch modems have one).
Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/atm/usbatm.h b/drivers/usb/atm/usbatm.h
index 1a31cf8..0e2caa0 100644
--- a/drivers/usb/atm/usbatm.h
+++ b/drivers/usb/atm/usbatm.h
@@ -87,6 +87,7 @@
/* flags, set by mini-driver in bind() */
#define UDSL_SKIP_HEAVY_INIT (1<<0)
+#define UDSL_USE_ISOC (1<<1)
/* mini driver */
@@ -118,8 +119,9 @@
/* cleanup ATM device ... can sleep, but can't fail */
void (*atm_stop) (struct usbatm_data *, struct atm_dev *);
- int in; /* rx endpoint */
- int out; /* tx endpoint */
+ int bulk_in; /* bulk rx endpoint */
+ int isoc_in; /* isochronous rx endpoint */
+ int bulk_out; /* bulk tx endpoint */
unsigned rx_padding;
unsigned tx_padding;
@@ -134,6 +136,7 @@
int endpoint; /* usb pipe */
unsigned int stride; /* ATM cell size + padding */
unsigned int buf_size; /* urb buffer size */
+ unsigned int packet_size; /* endpoint maxpacket */
spinlock_t lock;
struct list_head list;
struct tasklet_struct tasklet;