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authorAlan Stern <stern@rowland.harvard.edu>2005-11-30 11:57:51 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2006-01-04 13:51:41 -0800
commitfa3465689f93331834a831bbe98e3863701e1068 (patch)
treef8b1186d7ef49289817d54e35cb7cca82fcc3613 /drivers/usb
parentf0b80fbf294bc4f6ec179b09fd5b63df25188259 (diff)
[PATCH] USB: UHCI: change uhci_explen macro
This patch (as616) changed the uhci_explen macro in uhci-hcd.h so that it now accepts the desired length, rather than length - 1 with special handling for 0. This also fixes a minor bug that would show up only when a driver submits a 0-length bulk URB. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/uhci-hcd.c2
-rw-r--r--drivers/usb/host/uhci-hcd.h8
-rw-r--r--drivers/usb/host/uhci-q.c12
3 files changed, 11 insertions, 11 deletions
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 071fab6b647..120ca64fe3f 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -566,7 +566,7 @@ static int uhci_start(struct usb_hcd *hcd)
uhci->skel_bulk_qh->link = cpu_to_le32(uhci->skel_term_qh->dma_handle) | UHCI_PTR_QH;
/* This dummy TD is to work around a bug in Intel PIIX controllers */
- uhci_fill_td(uhci->term_td, 0, (UHCI_NULL_DATA_SIZE << 21) |
+ uhci_fill_td(uhci->term_td, 0, uhci_explen(0) |
(0x7f << TD_TOKEN_DEVADDR_SHIFT) | USB_PID_IN, 0);
uhci->term_td->link = cpu_to_le32(uhci->term_td->dma_handle);
diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h
index e576db57a92..e43282e4e80 100644
--- a/drivers/usb/host/uhci-hcd.h
+++ b/drivers/usb/host/uhci-hcd.h
@@ -71,8 +71,6 @@
#define USBLEGSUP_RWC 0x8f00 /* the R/WC bits */
#define USBLEGSUP_RO 0x5040 /* R/O and reserved bits */
-#define UHCI_NULL_DATA_SIZE 0x7FF /* for UHCI controller TD */
-
#define UHCI_PTR_BITS cpu_to_le32(0x000F)
#define UHCI_PTR_TERM cpu_to_le32(0x0001)
#define UHCI_PTR_QH cpu_to_le32(0x0002)
@@ -168,9 +166,11 @@ static __le32 inline qh_element(struct uhci_qh *qh) {
#define TD_TOKEN_EXPLEN_MASK 0x7FF /* expected length, encoded as n - 1 */
#define TD_TOKEN_PID_MASK 0xFF
-#define uhci_explen(len) ((len) << TD_TOKEN_EXPLEN_SHIFT)
+#define uhci_explen(len) ((((len) - 1) & TD_TOKEN_EXPLEN_MASK) << \
+ TD_TOKEN_EXPLEN_SHIFT)
-#define uhci_expected_length(token) ((((token) >> 21) + 1) & TD_TOKEN_EXPLEN_MASK)
+#define uhci_expected_length(token) ((((token) >> TD_TOKEN_EXPLEN_SHIFT) + \
+ 1) & TD_TOKEN_EXPLEN_MASK)
#define uhci_toggle(token) (((token) >> TD_TOKEN_TOGGLE_SHIFT) & 1)
#define uhci_endpoint(token) (((token) >> 15) & 0xf)
#define uhci_devaddr(token) (((token) >> TD_TOKEN_DEVADDR_SHIFT) & 0x7f)
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index 7e46887d9e1..ace9d15f85d 100644
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -596,7 +596,7 @@ static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb, struct ur
return -ENOMEM;
uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination | uhci_explen(7),
+ uhci_fill_td(td, status, destination | uhci_explen(8),
urb->setup_dma);
/*
@@ -628,7 +628,7 @@ static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb, struct ur
destination ^= TD_TOKEN_TOGGLE;
uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination | uhci_explen(pktsze - 1),
+ uhci_fill_td(td, status, destination | uhci_explen(pktsze),
data);
data += pktsze;
@@ -658,7 +658,7 @@ static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb, struct ur
uhci_add_td_to_urb(urb, td);
uhci_fill_td(td, status | TD_CTRL_IOC,
- destination | uhci_explen(UHCI_NULL_DATA_SIZE), 0);
+ destination | uhci_explen(0), 0);
qh = uhci_alloc_qh(uhci);
if (!qh)
@@ -864,7 +864,7 @@ static int uhci_submit_common(struct uhci_hcd *uhci, struct urb *urb, struct urb
return -ENOMEM;
uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination | uhci_explen(pktsze - 1) |
+ uhci_fill_td(td, status, destination | uhci_explen(pktsze) |
(usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT),
data);
@@ -890,7 +890,7 @@ static int uhci_submit_common(struct uhci_hcd *uhci, struct urb *urb, struct urb
return -ENOMEM;
uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination | uhci_explen(UHCI_NULL_DATA_SIZE) |
+ uhci_fill_td(td, status, destination | uhci_explen(0) |
(usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
usb_pipeout(urb->pipe)) << TD_TOKEN_TOGGLE_SHIFT),
data);
@@ -1092,7 +1092,7 @@ static int uhci_submit_isochronous(struct uhci_hcd *uhci, struct urb *urb)
return -ENOMEM;
uhci_add_td_to_urb(urb, td);
- uhci_fill_td(td, status, destination | uhci_explen(urb->iso_frame_desc[i].length - 1),
+ uhci_fill_td(td, status, destination | uhci_explen(urb->iso_frame_desc[i].length),
urb->transfer_dma + urb->iso_frame_desc[i].offset);
if (i + 1 >= urb->number_of_packets)