/*
* OHCI HCD (Host Controller Driver) for USB.
- *
+ *
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
- *
+ *
* This file is licenced under the GPL.
*/
#endif
/* urb->complete() can reenter this HCD */
+ usb_hcd_unlink_urb_from_ep(ohci_to_hcd(ohci), urb);
spin_unlock (&ohci->lock);
usb_hcd_giveback_urb (ohci_to_hcd(ohci), urb);
spin_lock (&ohci->lock);
/*-------------------------------------------------------------------------*
* ED handling functions
- *-------------------------------------------------------------------------*/
+ *-------------------------------------------------------------------------*/
/* search for the right schedule branch to use for a periodic ed.
* does some load balancing; returns the branch, or negative errno.
*/
for (i = 0; i < interval ; i++) {
if (branch < 0 || ohci->load [branch] > ohci->load [i]) {
-#if 1 /* CONFIG_USB_BANDWIDTH */
int j;
/* usb 1.1 says 90% of one frame */
}
if (j < NUM_INTS)
continue;
-#endif
- branch = i;
+ branch = i;
}
}
return branch;
/* link an ed into one of the HC chains */
static int ed_schedule (struct ohci_hcd *ohci, struct ed *ed)
-{
+{
int branch;
if (ohci_to_hcd(ohci)->state == HC_STATE_QUIESCING)
ed->ed_prev = NULL;
ed->ed_next = NULL;
ed->hwNextED = 0;
+ if (quirk_zfmicro(ohci)
+ && (ed->type == PIPE_INTERRUPT)
+ && !(ohci->eds_scheduled++))
+ mod_timer(&ohci->unlink_watchdog, round_jiffies_relative(HZ));
wmb ();
/* we care about rm_list when setting CLE/BLE in case the HC was at
}
ed->branch = branch;
periodic_link (ohci, ed);
- }
+ }
/* the HC may not see the schedule updates yet, but if it does
* then they'll be properly ordered.
*prev = ed->ed_next;
}
ohci->load [i] -= ed->load;
- }
+ }
ohci_to_hcd(ohci)->self.bandwidth_allocated -= ed->load / ed->interval;
ohci_vdbg (ohci, "unlink %sed %p branch %d [%dus.], interval %d\n",
ed, ed->branch, ed->load, ed->interval);
}
-/* unlink an ed from one of the HC chains.
+/* unlink an ed from one of the HC chains.
* just the link to the ed is unlinked.
* the link from the ed still points to another operational ed or 0
* so the HC can eventually finish the processing of the unlinked ed
* When finish_unlinks() runs later, after SOF interrupt, it will often
* complete one or more URB unlinks before making that state change.
*/
-static void ed_deschedule (struct ohci_hcd *ohci, struct ed *ed)
+static void ed_deschedule (struct ohci_hcd *ohci, struct ed *ed)
{
ed->hwINFO |= cpu_to_hc32 (ohci, ED_SKIP);
wmb ();
unsigned int pipe,
int interval
) {
- struct ed *ed;
+ struct ed *ed;
unsigned long flags;
spin_lock_irqsave (&ohci->lock, flags);
goto done;
}
- /* dummy td; end of td list for ed */
+ /* dummy td; end of td list for ed */
td = td_alloc (ohci, GFP_ATOMIC);
- if (!td) {
+ if (!td) {
/* out of memory */
ed_free (ohci, ed);
ed = NULL;
done:
spin_unlock_irqrestore (&ohci->lock, flags);
- return ed;
+ return ed;
}
/*-------------------------------------------------------------------------*/
* and that ed->state is ED_OPER
*/
static void start_ed_unlink (struct ohci_hcd *ohci, struct ed *ed)
-{
+{
ed->hwINFO |= cpu_to_hc32 (ohci, ED_DEQUEUE);
ed_deschedule (ohci, ed);
td->ed = urb_priv->ed;
td->next_dl_td = NULL;
td->index = index;
- td->urb = urb;
+ td->urb = urb;
td->data_dma = data;
if (!len)
data = 0;
(data & 0x0FFF) | 0xE000);
td->ed->last_iso = info & 0xffff;
} else {
- td->hwCBP = cpu_to_hc32 (ohci, data);
- }
+ td->hwCBP = cpu_to_hc32 (ohci, data);
+ }
if (data)
td->hwBE = cpu_to_hc32 (ohci, data + len - 1);
else
* use the device toggle bits for resetting, and rely on the fact
* that resetting toggle is meaningless if the endpoint is active.
*/
- if (!usb_gettoggle (urb->dev, usb_pipeendpoint (urb->pipe), is_out)) {
+ if (!usb_gettoggle (urb->dev, usb_pipeendpoint (urb->pipe), is_out)) {
usb_settoggle (urb->dev, usb_pipeendpoint (urb->pipe),
is_out, 1);
urb_priv->ed->hwHeadP &= ~cpu_to_hc32 (ohci, ED_C);
list_del (&td->td_list);
/* ISO ... drivers see per-TD length/status */
- if (tdINFO & TD_ISO) {
- u16 tdPSW = ohci_hwPSW (ohci, td, 0);
+ if (tdINFO & TD_ISO) {
+ u16 tdPSW = ohci_hwPSW (ohci, td, 0);
int dlen = 0;
/* NOTE: assumes FC in tdINFO == 0, and that
* only the first of 0..MAXPSW psws is used.
*/
- cc = (tdPSW >> 12) & 0xF;
- if (tdINFO & TD_CC) /* hc didn't touch? */
+ cc = (tdPSW >> 12) & 0xF;
+ if (tdINFO & TD_CC) /* hc didn't touch? */
return;
if (usb_pipeout (urb->pipe))
int type = usb_pipetype (urb->pipe);
u32 tdBE = hc32_to_cpup (ohci, &td->hwBE);
- cc = TD_CC_GET (tdINFO);
+ cc = TD_CC_GET (tdINFO);
/* update packet status if needed (short is normally ok) */
if (cc == TD_DATAUNDERRUN
urb, td, 1 + td->index, cc,
urb->actual_length,
urb->transfer_buffer_length);
- }
+ }
}
/*-------------------------------------------------------------------------*/
static inline struct td *
ed_halted (struct ohci_hcd *ohci, struct td *td, int cc, struct td *rev)
{
- struct urb *urb = td->urb;
+ struct urb *urb = td->urb;
struct ed *ed = td->ed;
struct list_head *tmp = td->td_list.next;
__hc32 toggle = ed->hwHeadP & cpu_to_hc32 (ohci, ED_C);
*/
ed->hwINFO |= cpu_to_hc32 (ohci, ED_SKIP);
wmb ();
- ed->hwHeadP &= ~cpu_to_hc32 (ohci, ED_H);
+ ed->hwHeadP &= ~cpu_to_hc32 (ohci, ED_H);
/* put any later tds from this urb onto the donelist, after 'td',
* order won't matter here: no errors, and nothing was transferred.
info &= ~cpu_to_hc32 (ohci, TD_CC);
next->hwINFO = info;
- next->next_dl_td = rev;
+ next->next_dl_td = rev;
rev = next;
ed->hwHeadP = next->hwNextTD | toggle;
/* get TD from hc's singly linked list, and
* prepend to ours. ed->td_list changes later.
*/
- while (td_dma) {
- int cc;
+ while (td_dma) {
+ int cc;
td = dma_to_td (ohci, td_dma);
if (!td) {
&& (td->ed->hwHeadP & cpu_to_hc32 (ohci, ED_H)))
td_rev = ed_halted (ohci, td, cc, td_rev);
- td->next_dl_td = td_rev;
+ td->next_dl_td = td_rev;
td_rev = td;
td_dma = hc32_to_cpup (ohci, &td->hwNextTD);
- }
+ }
return td_rev;
}
TD_MASK;
/* INTR_WDH may need to clean up first */
- if (td->td_dma != head)
- goto skip_ed;
+ if (td->td_dma != head) {
+ if (ed == ohci->ed_to_check)
+ ohci->ed_to_check = NULL;
+ else
+ goto skip_ed;
+ }
}
}
/* ED's now officially unlinked, hc doesn't see */
ed->state = ED_IDLE;
+ if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
+ ohci->eds_scheduled--;
ed->hwHeadP &= ~cpu_to_hc32(ohci, ED_H);
ed->hwNextED = 0;
wmb ();
if (modified)
goto rescan_all;
- }
+ }
- /* maybe reenable control and bulk lists */
+ /* maybe reenable control and bulk lists */
if (HC_IS_RUNNING(ohci_to_hcd(ohci)->state)
&& ohci_to_hcd(ohci)->state != HC_STATE_QUIESCING
&& !ohci->ed_rm_list) {
if (ohci->ed_controltail) {
command |= OHCI_CLF;
- if (ohci->flags & OHCI_QUIRK_ZFMICRO)
+ if (quirk_zfmicro(ohci))
mdelay(1);
if (!(ohci->hc_control & OHCI_CTRL_CLE)) {
control |= OHCI_CTRL_CLE;
}
if (ohci->ed_bulktail) {
command |= OHCI_BLF;
- if (ohci->flags & OHCI_QUIRK_ZFMICRO)
+ if (quirk_zfmicro(ohci))
mdelay(1);
if (!(ohci->hc_control & OHCI_CTRL_BLE)) {
control |= OHCI_CTRL_BLE;
&ohci->regs->ed_bulkcurrent);
}
}
-
+
/* CLE/BLE to enable, CLF/BLF to (maybe) kickstart */
if (control) {
ohci->hc_control |= control;
- if (ohci->flags & OHCI_QUIRK_ZFMICRO)
+ if (quirk_zfmicro(ohci))
mdelay(1);
- ohci_writel (ohci, ohci->hc_control,
- &ohci->regs->control);
- }
+ ohci_writel (ohci, ohci->hc_control,
+ &ohci->regs->control);
+ }
if (command) {
- if (ohci->flags & OHCI_QUIRK_ZFMICRO)
+ if (quirk_zfmicro(ohci))
mdelay(1);
- ohci_writel (ohci, command, &ohci->regs->cmdstatus);
- }
+ ohci_writel (ohci, command, &ohci->regs->cmdstatus);
+ }
}
}
/*-------------------------------------------------------------------------*/
+/*
+ * Used to take back a TD from the host controller. This would normally be
+ * called from within dl_done_list, however it may be called directly if the
+ * HC no longer sees the TD and it has not appeared on the donelist (after
+ * two frames). This bug has been observed on ZF Micro systems.
+ */
+static void takeback_td(struct ohci_hcd *ohci, struct td *td)
+{
+ struct urb *urb = td->urb;
+ urb_priv_t *urb_priv = urb->hcpriv;
+ struct ed *ed = td->ed;
+
+ /* update URB's length and status from TD */
+ td_done(ohci, urb, td);
+ urb_priv->td_cnt++;
+
+ /* If all this urb's TDs are done, call complete() */
+ if (urb_priv->td_cnt == urb_priv->length)
+ finish_urb(ohci, urb);
+
+ /* clean schedule: unlink EDs that are no longer busy */
+ if (list_empty(&ed->td_list)) {
+ if (ed->state == ED_OPER)
+ start_ed_unlink(ohci, ed);
+
+ /* ... reenabling halted EDs only after fault cleanup */
+ } else if ((ed->hwINFO & cpu_to_hc32(ohci, ED_SKIP | ED_DEQUEUE))
+ == cpu_to_hc32(ohci, ED_SKIP)) {
+ td = list_entry(ed->td_list.next, struct td, td_list);
+ if (!(td->hwINFO & cpu_to_hc32(ohci, TD_DONE))) {
+ ed->hwINFO &= ~cpu_to_hc32(ohci, ED_SKIP);
+ /* ... hc may need waking-up */
+ switch (ed->type) {
+ case PIPE_CONTROL:
+ ohci_writel(ohci, OHCI_CLF,
+ &ohci->regs->cmdstatus);
+ break;
+ case PIPE_BULK:
+ ohci_writel(ohci, OHCI_BLF,
+ &ohci->regs->cmdstatus);
+ break;
+ }
+ }
+ }
+}
+
/*
* Process normal completions (error or success) and clean the schedules.
*
* This is the main path for handing urbs back to drivers. The only other
- * path is finish_unlinks(), which unlinks URBs using ed_rm_list, instead of
- * scanning the (re-reversed) donelist as this does.
+ * normal path is finish_unlinks(), which unlinks URBs using ed_rm_list,
+ * instead of scanning the (re-reversed) donelist as this does. There's
+ * an abnormal path too, handling a quirk in some Compaq silicon: URBs
+ * with TDs that appear to be orphaned are directly reclaimed.
*/
static void
dl_done_list (struct ohci_hcd *ohci)
{
struct td *td = dl_reverse_done_list (ohci);
- while (td) {
+ while (td) {
struct td *td_next = td->next_dl_td;
- struct urb *urb = td->urb;
- urb_priv_t *urb_priv = urb->hcpriv;
- struct ed *ed = td->ed;
-
- /* update URB's length and status from TD */
- td_done (ohci, urb, td);
- urb_priv->td_cnt++;
-
- /* If all this urb's TDs are done, call complete() */
- if (urb_priv->td_cnt == urb_priv->length)
- finish_urb (ohci, urb);
-
- /* clean schedule: unlink EDs that are no longer busy */
- if (list_empty (&ed->td_list)) {
- if (ed->state == ED_OPER)
- start_ed_unlink (ohci, ed);
-
- /* ... reenabling halted EDs only after fault cleanup */
- } else if ((ed->hwINFO & cpu_to_hc32 (ohci, ED_SKIP | ED_DEQUEUE))
- == cpu_to_hc32 (ohci, ED_SKIP)) {
- td = list_entry (ed->td_list.next, struct td, td_list);
- if (!(td->hwINFO & cpu_to_hc32 (ohci, TD_DONE))) {
- ed->hwINFO &= ~cpu_to_hc32 (ohci, ED_SKIP);
- /* ... hc may need waking-up */
- switch (ed->type) {
- case PIPE_CONTROL:
- ohci_writel (ohci, OHCI_CLF,
- &ohci->regs->cmdstatus);
- break;
- case PIPE_BULK:
- ohci_writel (ohci, OHCI_BLF,
- &ohci->regs->cmdstatus);
- break;
- }
- }
- }
-
- td = td_next;
- }
+ takeback_td(ohci, td);
+ td = td_next;
+ }
}
projects / linux-2.6-omap-h63xx.git / blobdiff