diff options
| author | Allen Martin <amartin@nvidia.com> | 2012-10-24 08:32:04 +0000 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2012-11-20 00:16:05 +0100 |
| commit | d7475386bb75ec4e49be66d83775edb043dbfb43 (patch) | |
| tree | 5f2f6888d5aec547ec5639061336067d1ca0d7ef /common | |
| parent | c11ace6b7bcfef535198b607e43adea65c8ce7dd (diff) | |
USB: make usb_kbd obey USB DMA alignment requirements
Change usb_kbd driver to obey alignment requirements for USB DMA on
the buffer used for data transfer. This is necessary for
architectures that enable dcache and enable USB DMA.
Signed-off-by: Allen Martin <amartin@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'common')
| -rw-r--r-- | common/usb_kbd.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/common/usb_kbd.c b/common/usb_kbd.c index 19f01db1ca..24467cec14 100644 --- a/common/usb_kbd.c +++ b/common/usb_kbd.c @@ -112,7 +112,7 @@ struct usb_kbd_pdata { uint32_t usb_out_pointer; uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN]; - uint8_t new[8]; + uint8_t *new; uint8_t old[8]; uint8_t flags; @@ -435,6 +435,9 @@ static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum) /* Clear private data */ memset(data, 0, sizeof(struct usb_kbd_pdata)); + /* allocate input buffer aligned and sized to USB DMA alignment */ + data->new = memalign(USB_DMA_MINALIGN, roundup(8, USB_DMA_MINALIGN)); + /* Insert private data into USB device structure */ dev->privptr = data; |