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usb: mv_udc: Add bounce buffer

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The requests sent to the controller are not properly cache aligned
most of the time, thus implement a simple bounce buffer to avoid
problem with cache.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Lei Wen <leiwen@marvell.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Marek Vasut
2013-07-10 03:16:43 +02:00
parent f19a343e73
commit 6dd30af0fa
2 changed files with 82 additions and 8 deletions
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6
include/usb/mv_udc.h
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@@ -66,9 +66,13 @@ struct mv_udc {
struct mv_ep {
struct usb_ep ep;
struct usb_request req;
struct list_head queue;
const struct usb_endpoint_descriptor *desc;
struct usb_request req;
uint8_t *b_buf;
uint32_t b_len;
uint8_t b_fast[64] __aligned(ARCH_DMA_MINALIGN);
};
struct mv_drv {