From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lucas Stach Date: Fri, 31 Aug 2012 01:13:34 +0200 Subject: [U-Boot] =?utf-8?q?=5BPATCH=5D_usb=3A_do_explicit_unaligned_acces?= =?utf-8?q?ses?= Message-ID: <1346368414-993-1-git-send-email-dev@lynxeye.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de usb_hub_descriptor has to be packed as it's used for communication with the device. Member wHubCharacteristics violates the natural alignment rules. Use explicit unaligned access functions for this member. Fixes ARMv7 traping while using USB. Signed-off-by: Lucas Stach --- common/usb_hub.c | 14 +++++++++----- drivers/usb/host/ehci-hcd.c | 7 +++++-- 2 Dateien ge?ndert, 14 Zeilen hinzugef?gt(+), 7 Zeilen entfernt(-) diff --git a/common/usb_hub.c b/common/usb_hub.c index 53d939c..b8cd990 100644 --- a/common/usb_hub.c +++ b/common/usb_hub.c @@ -43,6 +43,7 @@ #include #include #include +#include #include #include #include @@ -269,6 +270,7 @@ static int usb_hub_configure(struct usb_device *dev) int i; ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ); unsigned char *bitmap; + short hubCharacteristics; struct usb_hub_descriptor *descriptor; struct usb_hub_device *hub; #ifdef USB_HUB_DEBUG @@ -304,8 +306,9 @@ static int usb_hub_configure(struct usb_device *dev) } memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength); /* adjust 16bit values */ - hub->desc.wHubCharacteristics = - le16_to_cpu(descriptor->wHubCharacteristics); + put_unaligned(le16_to_cpu(get_unaligned( + &descriptor->wHubCharacteristics)), + &descriptor->wHubCharacteristics); /* set the bitmap */ bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0]; /* devices not removable by default */ @@ -322,7 +325,8 @@ static int usb_hub_configure(struct usb_device *dev) dev->maxchild = descriptor->bNbrPorts; USB_HUB_PRINTF("%d ports detected\n", dev->maxchild); - switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) { + hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics); + switch (hubCharacteristics & HUB_CHAR_LPSM) { case 0x00: USB_HUB_PRINTF("ganged power switching\n"); break; @@ -335,12 +339,12 @@ static int usb_hub_configure(struct usb_device *dev) break; } - if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND) + if (hubCharacteristics & HUB_CHAR_COMPOUND) USB_HUB_PRINTF("part of a compound device\n"); else USB_HUB_PRINTF("standalone hub\n"); - switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) { + switch (hubCharacteristics & HUB_CHAR_OCPM) { case 0x00: USB_HUB_PRINTF("global over-current protection\n"); break; diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index bfea192..d90e94d 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -22,6 +22,7 @@ */ #include #include +#include #include #include #include @@ -876,10 +877,12 @@ int usb_lowlevel_init(int index, void **controller) debug("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts); /* Port Indicators */ if (HCS_INDICATOR(reg)) - descriptor.hub.wHubCharacteristics |= 0x80; + put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics) + | 0x80, &descriptor.hub.wHubCharacteristics); /* Port Power Control */ if (HCS_PPC(reg)) - descriptor.hub.wHubCharacteristics |= 0x01; + put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics) + | 0x01, &descriptor.hub.wHubCharacteristics); /* Start the host controller. */ cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd); -- 1.7.11.4