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| author | Wolfgang Denk <wd@denx.de> | 2010-10-19 16:13:15 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-10-20 00:23:57 +0200 |
| commit | 3ed16071b006dbda65070a4143db74da469f6e30 (patch) | |
| tree | 855adef8060aff452e1193dde322281adf01f682 /drivers/usb/host | |
| parent | d078b7c2ec8624e084e1493304816949ff382bda (diff) | |
| download | u-boot-imx-3ed16071b006dbda65070a4143db74da469f6e30.zip u-boot-imx-3ed16071b006dbda65070a4143db74da469f6e30.tar.gz u-boot-imx-3ed16071b006dbda65070a4143db74da469f6e30.tar.bz2 | |
USB: sync Queue Element Transfer Descriptor against EHCI spec
Appendix B "EHCI 64-Bit Data Structures" of the "Enhanced Host
Controller Interface Specification for Universal Serial Bus" (Rev.
1.0, March 12, 2002) defines additional fields which were missing in
U-Boot's struct qTD; as these are also present in recent versions of
struct ehci_qtd in the Linux kernel, we add them here, too.
This fixes some nasty memory corruption problems.
Reported-by: Dan Lykowski <lykowdk@gmail.com>
See http://permalink.gmane.org/gmane.comp.boot-loaders.u-boot/76942
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Remy Bohmer <linux@bohmer.net>
Cc: Dan Lykowski <lykowdk@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Tested-by: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 1 | ||||
| -rw-r--r-- | drivers/usb/host/ehci.h | 14 |
2 files changed, 10 insertions, 5 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 37d056e..f44fc4e 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -288,6 +288,7 @@ static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz) idx = 0; while (idx < 5) { td->qt_buffer[idx] = cpu_to_hc32(addr); + td->qt_buffer_hi[idx] = 0; next = (addr + 4096) & ~4095; delta = next - addr; if (delta >= sz) diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index 6fae8ba..d3aa55b 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -166,12 +166,16 @@ struct usb_linux_config_descriptor { /* Queue Element Transfer Descriptor (qTD). */ struct qTD { - uint32_t qt_next; + /* this part defined by EHCI spec */ + uint32_t qt_next; /* see EHCI 3.5.1 */ #define QT_NEXT_TERMINATE 1 - uint32_t qt_altnext; - uint32_t qt_token; - uint32_t qt_buffer[5]; -}; + uint32_t qt_altnext; /* see EHCI 3.5.2 */ + uint32_t qt_token; /* see EHCI 3.5.3 */ + uint32_t qt_buffer[5]; /* see EHCI 3.5.4 */ + uint32_t qt_buffer_hi[5]; /* Appendix B */ + /* pad struct for 32 byte alignment */ + uint32_t unused[3]; +} __attribute__ ((aligned (32))); /* Queue Head (QH). */ struct QH { |