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UHCI: Add macros for computing DMA values

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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>
This commit is contained in:
Alan Stern
2007-02-19 15:51:51 -05:00
committed by Greg Kroah-Hartman
父節點 d0374f4f9c
當前提交 28b9325e6a
共有 4 個文件被更改，包括 33 次插入 和 36 次删除
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30
drivers/usb/host/uhci-q.c
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@@ -46,8 +46,7 @@ static inline void uhci_clear_next_interrupt(struct uhci_hcd *uhci)
static void uhci_fsbr_on(struct uhci_hcd *uhci)
{
uhci->fsbr_is_on = 1;
uhci->skel_term_qh->link = cpu_to_le32(
uhci->skel_fs_control_qh->dma_handle) | UHCI_PTR_QH;
uhci->skel_term_qh->link = LINK_TO_QH(uhci->skel_fs_control_qh);
}
static void uhci_fsbr_off(struct uhci_hcd *uhci)
@@ -158,11 +157,11 @@ static inline void uhci_insert_td_in_frame_list(struct uhci_hcd *uhci,
td->link = ltd->link;
wmb();
ltd->link = cpu_to_le32(td->dma_handle);
ltd->link = LINK_TO_TD(td);
} else {
td->link = uhci->frame[framenum];
wmb();
uhci->frame[framenum] = cpu_to_le32(td->dma_handle);
uhci->frame[framenum] = LINK_TO_TD(td);
uhci->frame_cpu[framenum] = td;
}
}
@@ -184,7 +183,7 @@ static inline void uhci_remove_td_from_frame_list(struct uhci_hcd *uhci,
struct uhci_td *ntd;
ntd = list_entry(td->fl_list.next, struct uhci_td, fl_list);
uhci->frame[td->frame] = cpu_to_le32(ntd->dma_handle);
uhci->frame[td->frame] = LINK_TO_TD(ntd);
uhci->frame_cpu[td->frame] = ntd;
}
} else {
@@ -421,7 +420,7 @@ static void uhci_activate_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
struct uhci_td *td = list_entry(urbp->td_list.next,
struct uhci_td, list);
qh->element = cpu_to_le32(td->dma_handle);
qh->element = LINK_TO_TD(td);
}
/* Treat the queue as if it has just advanced */
@@ -443,7 +442,7 @@ static void uhci_activate_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
pqh = list_entry(qh->node.prev, struct uhci_qh, node);
qh->link = pqh->link;
wmb();
pqh->link = UHCI_PTR_QH | cpu_to_le32(qh->dma_handle);
pqh->link = LINK_TO_QH(qh);
}
/*
@@ -737,7 +736,7 @@ static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb,
td = uhci_alloc_td(uhci);
if (!td)
goto nomem;
*plink = cpu_to_le32(td->dma_handle);
*plink = LINK_TO_TD(td);
/* Alternate Data0/1 (start with Data1) */
destination ^= TD_TOKEN_TOGGLE;
@@ -757,7 +756,7 @@ static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb,
td = uhci_alloc_td(uhci);
if (!td)
goto nomem;
*plink = cpu_to_le32(td->dma_handle);
*plink = LINK_TO_TD(td);
/*
* It's IN if the pipe is an output pipe or we're not expecting
@@ -784,7 +783,7 @@ static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb,
td = uhci_alloc_td(uhci);
if (!td)
goto nomem;
*plink = cpu_to_le32(td->dma_handle);
*plink = LINK_TO_TD(td);
uhci_fill_td(td, 0, USB_PID_OUT | uhci_explen(0), 0);
wmb();
@@ -860,7 +859,7 @@ static int uhci_submit_common(struct uhci_hcd *uhci, struct urb *urb,
td = uhci_alloc_td(uhci);
if (!td)
goto nomem;
*plink = cpu_to_le32(td->dma_handle);
*plink = LINK_TO_TD(td);
}
uhci_add_td_to_urbp(td, urbp);
uhci_fill_td(td, status,
@@ -888,7 +887,7 @@ static int uhci_submit_common(struct uhci_hcd *uhci, struct urb *urb,
td = uhci_alloc_td(uhci);
if (!td)
goto nomem;
*plink = cpu_to_le32(td->dma_handle);
*plink = LINK_TO_TD(td);
uhci_add_td_to_urbp(td, urbp);
uhci_fill_td(td, status,
@@ -914,7 +913,7 @@ static int uhci_submit_common(struct uhci_hcd *uhci, struct urb *urb,
td = uhci_alloc_td(uhci);
if (!td)
goto nomem;
*plink = cpu_to_le32(td->dma_handle);
*plink = LINK_TO_TD(td);
uhci_fill_td(td, 0, USB_PID_OUT | uhci_explen(0), 0);
wmb();
@@ -1005,7 +1004,7 @@ static int uhci_fixup_short_transfer(struct uhci_hcd *uhci,
* the queue at the status stage transaction, which is
* the last TD. */
WARN_ON(list_empty(&urbp->td_list));
qh->element = cpu_to_le32(td->dma_handle);
qh->element = LINK_TO_TD(td);
tmp = td->list.prev;
ret = -EINPROGRESS;
@@ -1566,8 +1565,7 @@ static int uhci_advance_check(struct uhci_hcd *uhci, struct uhci_qh *qh)
if (time_after(jiffies, qh->advance_jiffies + QH_WAIT_TIMEOUT)) {
/* Detect the Intel bug and work around it */
if (qh->post_td && qh_element(qh) ==
cpu_to_le32(qh->post_td->dma_handle)) {
if (qh->post_td && qh_element(qh) == LINK_TO_TD(qh->post_td)) {
qh->element = qh->post_td->link;
qh->advance_jiffies = jiffies;
ret = 1;