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authorAlan Stern <stern@rowland.harvard.edu>2007-02-19 23:51:51 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2007-02-24 02:03:45 +0300
commit28b9325e6ae45ffb5e99fedcafe00f25fcaacf06 (patch)
tree91391a8e2d11acc50adc5b7c631b2695bee9e453 /drivers/usb/host/uhci-hcd.h
parentd0374f4f9c35cdfbee0ade72d06732613b4e6628 (diff)
downloadlinux-28b9325e6ae45ffb5e99fedcafe00f25fcaacf06.tar.xz
UHCI: Add macros for computing DMA values
This patch (as855) adds some convenience macros to uhci-hcd, to help simplify the code for computing hardware DMA pointers. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/uhci-hcd.h')
-rw-r--r--drivers/usb/host/uhci-hcd.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h
index 74469b5bcb61..a8c256b44d8e 100644
--- a/drivers/usb/host/uhci-hcd.h
+++ b/drivers/usb/host/uhci-hcd.h
@@ -129,6 +129,8 @@ struct uhci_qh {
__le32 element; /* Queue element (TD) pointer */
/* Software fields */
+ dma_addr_t dma_handle;
+
struct list_head node; /* Node in the list of QHs */
struct usb_host_endpoint *hep; /* Endpoint information */
struct usb_device *udev;
@@ -150,8 +152,6 @@ struct uhci_qh {
int state; /* QH_STATE_xxx; see above */
int type; /* Queue type (control, bulk, etc) */
- dma_addr_t dma_handle;
-
unsigned int initial_toggle:1; /* Endpoint's current toggle value */
unsigned int needs_fixup:1; /* Must fix the TD toggle values */
unsigned int is_stopped:1; /* Queue was stopped by error/unlink */
@@ -171,6 +171,8 @@ static inline __le32 qh_element(struct uhci_qh *qh) {
return element;
}
+#define LINK_TO_QH(qh) (UHCI_PTR_QH | cpu_to_le32((qh)->dma_handle))
+
/*
* Transfer Descriptors
@@ -264,6 +266,8 @@ static inline u32 td_status(struct uhci_td *td) {
return le32_to_cpu(status);
}
+#define LINK_TO_TD(td) (cpu_to_le32((td)->dma_handle))
+
/*
* Skeleton Queue Headers