> As DMA expects the buffers to be equal and larger then > cache lines, This aligns buffers at cacheline. > > Signed-off-by: Puneet Saxena <pune...@nvidia.com> > --- > > Changes for V3: > - Removed local descriptor elements copy to global descriptor elements > - Removed "Signed-off-by: Jim Lin <ji...@nvidia.com>" from commit > message > > Changes for V4: > - Added memcpy to copy local descriptor to global descriptor. > Without that, USB version, class, vendor, product Id...etc is not > configured. This information is useful for loading correct device driver > and possible configuration. > > > common/cmd_usb.c | 3 +- > common/usb.c | 56 > ++++++++++++++++++++++------------------ common/usb_storage.c | > 59 ++++++++++++++++++++---------------------- disk/part_dos.c > | 2 +- > drivers/usb/host/ehci-hcd.c | 8 ++++++ > include/scsi.h | 4 ++- > 6 files changed, 73 insertions(+), 59 deletions(-) > > diff --git a/common/cmd_usb.c b/common/cmd_usb.c > index 320667f..bca9d94 100644 > --- a/common/cmd_usb.c > +++ b/common/cmd_usb.c > @@ -150,7 +150,8 @@ void usb_display_class_sub(unsigned char dclass, > unsigned char subclass, > > void usb_display_string(struct usb_device *dev, int index) > { > - char buffer[256]; > + ALLOC_CACHE_ALIGN_BUFFER(char, buffer, 256); > + > if (index != 0) { > if (usb_string(dev, index, &buffer[0], 256) > 0) > printf("String: \"%s\"", buffer); > diff --git a/common/usb.c b/common/usb.c > index 6e21ae2..42a44e2 100644 > --- a/common/usb.c > +++ b/common/usb.c > @@ -73,7 +73,6 @@ static struct usb_device usb_dev[USB_MAX_DEVICE]; > static int dev_index; > static int running; > static int asynch_allowed; > -static struct devrequest setup_packet; > > char usb_started; /* flag for the started/stopped USB status */ > > @@ -185,23 +184,25 @@ int usb_control_msg(struct usb_device *dev, unsigned > int pipe, unsigned short value, unsigned short index, > void *data, unsigned short size, int timeout) > { > + ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, > + sizeof(struct devrequest)); > if ((timeout == 0) && (!asynch_allowed)) { > /* request for a asynch control pipe is not allowed */ > return -1; > } > > /* set setup command */ > - setup_packet.requesttype = requesttype; > - setup_packet.request = request; > - setup_packet.value = cpu_to_le16(value); > - setup_packet.index = cpu_to_le16(index); > - setup_packet.length = cpu_to_le16(size); > + setup_packet->requesttype = requesttype; > + setup_packet->request = request; > + setup_packet->value = cpu_to_le16(value); > + setup_packet->index = cpu_to_le16(index); > + setup_packet->length = cpu_to_le16(size); > USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \ > "value 0x%X index 0x%X length 0x%X\n", > request, requesttype, value, index, size); > dev->status = USB_ST_NOT_PROC; /*not yet processed */ > > - submit_control_msg(dev, pipe, data, size, &setup_packet); > + submit_control_msg(dev, pipe, data, size, setup_packet); > if (timeout == 0) > return (int)size; > > @@ -698,7 +699,7 @@ static int usb_string_sub(struct usb_device *dev, > unsigned int langid, */ > int usb_string(struct usb_device *dev, int index, char *buf, size_t size) > { > - unsigned char mybuf[USB_BUFSIZ]; > + ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ); > unsigned char *tbuf; > int err; > unsigned int u, idx; > @@ -798,7 +799,7 @@ int usb_new_device(struct usb_device *dev) > { > int addr, err; > int tmp; > - unsigned char tmpbuf[USB_BUFSIZ]; > + ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ); > > /* We still haven't set the Address yet */ > addr = dev->devnum; > @@ -909,7 +910,7 @@ int usb_new_device(struct usb_device *dev) > tmp = sizeof(dev->descriptor); > > err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, > - &dev->descriptor, sizeof(dev->descriptor)); > + desc, sizeof(dev->descriptor)); > if (err < tmp) { > if (err < 0) > printf("unable to get device descriptor (error=%d)\n", > @@ -919,14 +920,18 @@ int usb_new_device(struct usb_device *dev) > "(expected %i, got %i)\n", tmp, err); > return 1; > } > + > + /* Now copy the local device descriptor to global device descriptor*/ > + memcpy(&dev->descriptor, desc, sizeof(dev->descriptor));
Hey, it's almost perfect! Just one last question -- why do you need to copy this stuff? It's because dev- >descriptor is unaligned? M _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot