The fsl udc driver allocates a buffer for small requests. The
driver then calls dma_inv_range later on it. This buffer happens
to be not cacheline aligned which means that a dma_inv_range can
corrupt other memory around the buffer.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
[mkl: use dma_alloc]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
- this patch sync fsl_udc.c with linux's driver,
- add a poller on usb_gadget_poll to get serial gadget working,
- return -EIO in usb_gadget_poll when udc is stopped (do detect
cable disonnection)
- tested on i.MX25 & i.MX35
Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
To allow for some generic io accessors introduce io.h and use
this instead of asm/io.h throughout the tree.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The idea is to panic() when there is no memory available for normal
operation. Exception: code which can consume arbitrary amount of RAM
(example: files allocated in ramfs) must report error instead of panic().
This patch also fixes code which didn't check for NULL from malloc() etc.
Usage: malloc(), memalign() return NULL when out of RAM.
xmalloc(), xmemalign() always return non-NULL or panic().
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
this patch fix the following warning :
drivers/usb/gadget/fsl_udc.c: In function 'done':
drivers/usb/gadget/fsl_udc.c:566: warning: passing argument 1 of 'dma_inv_range' makes integer from pointer without a cast
arch/arm/include/asm/mmu.h:24: note: expected 'long unsigned int' but argument is of type 'void *'
drivers/usb/gadget/fsl_udc.c:566: warning: passing argument 2 of 'dma_inv_range' makes integer from pointer without a cast
arch/arm/include/asm/mmu.h:24: note: expected 'long unsigned int' but argument is of type 'void *'
Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This patch adds support for USB devices. It uses
the Linux Kernel gadget API. Along with this patch
comes driver support for the Freescale (arc) USB OTG
Core and USB Device Firmware Update (DFU)
The serial gadget support is not working at the moment.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Alexander Shiyan
Jean-Christophe PLAGNIOL-VILLARD
Sascha Hauer
Eric Bénard
Krzysztof Halasa