usb: dwc2/gadget: assign TX FIFO dynamically
Because we have not enough memory to have each TX FIFO of size at least
3072 bytes (the maximum single packet size with 3 transactions per
microframe), we create four FIFOs of lenght 1024, and four of length
3072 bytes, and assing them to endpoints dynamically according to
maxpacket size value of given endpoint.
Up to now there were initialized 16 TX FIFOs, but we use only 8 IN
endpoints, so we can split available memory for 8 FIFOs to have more
memory for each one.
It needed to do some small modifications in few places in code, because
there was assumption that TX FIFO numbers assigned to endpoints are the
same as the endpoint numbers, which is not true since we have dynamic
FIFO assigning.
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index ba505f1..bf015ab 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -139,6 +139,7 @@
unsigned int last_load;
unsigned int fifo_load;
unsigned short fifo_size;
+ unsigned short fifo_index;
unsigned char dir_in;
unsigned char index;
@@ -197,6 +198,7 @@
int fifo_mem;
unsigned int dedicated_fifos:1;
unsigned char num_of_eps;
+ u32 fifo_map;
struct dentry *debug_root;
struct dentry *debug_file;