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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
parent d0374f4f9c
commit 28b9325e6a
4 changed files with 33 additions and 36 deletions
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9
drivers/usb/host/uhci-debug.c
View File

@ -196,7 +196,7 @@ static int uhci_show_qh(struct uhci_qh *qh, char *buf, int len, int space)
struct uhci_td *td = list_entry(urbp->td_list.next,
struct uhci_td, list);
if (cpu_to_le32(td->dma_handle) != (element & ~UHCI_PTR_BITS))
if (element != LINK_TO_TD(td))
out += sprintf(out, "%*s Element != First TD\n",
space, "");
i = nurbs = 0;
@ -393,7 +393,7 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
do {
td = list_entry(tmp, struct uhci_td, fl_list);
tmp = tmp->next;
if (cpu_to_le32(td->dma_handle) != link) {
if (link != LINK_TO_TD(td)) {
if (nframes > 0)
out += sprintf(out, " link does "
"not match list entry!\n");
@ -440,7 +440,7 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
if (qh->link != UHCI_PTR_TERM)
out += sprintf(out, " bandwidth reclamation on!\n");
if (qh_element(qh) != cpu_to_le32(uhci->term_td->dma_handle))
if (qh_element(qh) != LINK_TO_TD(uhci->term_td))
out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
continue;
@ -461,8 +461,7 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
out += sprintf(out, " Skipped %d QHs\n", cnt);
if (i > 1 && i < UHCI_NUM_SKELQH - 1) {
if (qh->link !=
(cpu_to_le32(uhci->skelqh[j]->dma_handle) | UHCI_PTR_QH))
if (qh->link != LINK_TO_QH(uhci->skelqh[j]))
out += sprintf(out, " last QH not linked to next skeleton!\n");
}
}

22
drivers/usb/host/uhci-hcd.c
View File

@ -116,7 +116,7 @@ static __le32 uhci_frame_skel_link(struct uhci_hcd *uhci, int frame)
skelnum = 8 - (int) __ffs(frame | UHCI_NUMFRAMES);
if (skelnum <= 1)
skelnum = 9;
return UHCI_PTR_QH | cpu_to_le32(uhci->skelqh[skelnum]->dma_handle);
return LINK_TO_QH(uhci->skelqh[skelnum]);
}
#include "uhci-debug.c"
@ -635,25 +635,21 @@ static int uhci_start(struct usb_hcd *hcd)
uhci->skel_int16_qh->link =
uhci->skel_int8_qh->link =
uhci->skel_int4_qh->link =
uhci->skel_int2_qh->link = UHCI_PTR_QH |
cpu_to_le32(uhci->skel_int1_qh->dma_handle);
uhci->skel_int2_qh->link = LINK_TO_QH(
uhci->skel_int1_qh);
uhci->skel_int1_qh->link = UHCI_PTR_QH |
cpu_to_le32(uhci->skel_ls_control_qh->dma_handle);
uhci->skel_ls_control_qh->link = UHCI_PTR_QH |
cpu_to_le32(uhci->skel_fs_control_qh->dma_handle);
uhci->skel_fs_control_qh->link = UHCI_PTR_QH |
cpu_to_le32(uhci->skel_bulk_qh->dma_handle);
uhci->skel_bulk_qh->link = UHCI_PTR_QH |
cpu_to_le32(uhci->skel_term_qh->dma_handle);
uhci->skel_int1_qh->link = LINK_TO_QH(uhci->skel_ls_control_qh);
uhci->skel_ls_control_qh->link = LINK_TO_QH(uhci->skel_fs_control_qh);
uhci->skel_fs_control_qh->link = LINK_TO_QH(uhci->skel_bulk_qh);
uhci->skel_bulk_qh->link = LINK_TO_QH(uhci->skel_term_qh);
/* This dummy TD is to work around a bug in Intel PIIX controllers */
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);
uhci->term_td->link = LINK_TO_TD(uhci->term_td);
uhci->skel_term_qh->link = UHCI_PTR_TERM;
uhci->skel_term_qh->element = cpu_to_le32(uhci->term_td->dma_handle);
uhci->skel_term_qh->element = LINK_TO_TD(uhci->term_td);
/*
* Fill the frame list: make all entries point to the proper

8
drivers/usb/host/uhci-hcd.h
View File

@ -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

30
drivers/usb/host/uhci-q.c
View File

@ -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;