#define EHCI_TUNE_MULT_TT 1
#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
-#define EHCI_IAA_MSECS 10 /* arbitrary */
+#define EHCI_IAA_JIFFIES (HZ/100) /* arbitrary; ~10 msec */
#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */
#define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */
#define EHCI_SHRINK_JIFFIES (HZ/200) /* async qh unlink delay */
module_param (park, uint, S_IRUGO);
MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets");
+/* for flakey hardware, ignore overcurrent indicators */
+static int ignore_oc = 0;
+module_param (ignore_oc, bool, S_IRUGO);
+MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
+
#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
-static void end_unlink_async (struct ehci_hcd *ehci, struct pt_regs *regs);
-static void ehci_work(struct ehci_hcd *ehci, struct pt_regs *regs);
+static void ehci_work(struct ehci_hcd *ehci);
#include "ehci-hub.c"
#include "ehci-mem.c"
/*-------------------------------------------------------------------------*/
-static void ehci_iaa_watchdog (unsigned long param)
+static void ehci_watchdog (unsigned long param)
{
struct ehci_hcd *ehci = (struct ehci_hcd *) param;
unsigned long flags;
- u32 status;
spin_lock_irqsave (&ehci->lock, flags);
- WARN_ON(!ehci->reclaim);
- /* lost IAA irqs wedge things badly; seen first with a vt8235 */
+ /* lost IAA irqs wedge things badly; seen with a vt8235 */
if (ehci->reclaim) {
- status = readl (&ehci->regs->status);
+ u32 status = readl (&ehci->regs->status);
if (status & STS_IAA) {
ehci_vdbg (ehci, "lost IAA\n");
COUNT (ehci->stats.lost_iaa);
writel (STS_IAA, &ehci->regs->status);
- end_unlink_async (ehci, NULL);
+ ehci->reclaim_ready = 1;
}
}
- spin_unlock_irqrestore (&ehci->lock, flags);
-}
-
-static void ehci_watchdog (unsigned long param)
-{
- struct ehci_hcd *ehci = (struct ehci_hcd *) param;
- unsigned long flags;
-
- spin_lock_irqsave (&ehci->lock, flags);
-
- /* stop async processing after it's idled a bit */
+ /* stop async processing after it's idled a bit */
if (test_bit (TIMER_ASYNC_OFF, &ehci->actions))
start_unlink_async (ehci, ehci->async);
/* ehci could run by timer, without IRQs ... */
- ehci_work (ehci, NULL);
+ ehci_work (ehci);
spin_unlock_irqrestore (&ehci->lock, flags);
}
* ehci_work is called from some interrupts, timers, and so on.
* it calls driver completion functions, after dropping ehci->lock.
*/
-static void ehci_work (struct ehci_hcd *ehci, struct pt_regs *regs)
+static void ehci_work (struct ehci_hcd *ehci)
{
timer_action_done (ehci, TIMER_IO_WATCHDOG);
+ if (ehci->reclaim_ready)
+ end_unlink_async (ehci);
/* another CPU may drop ehci->lock during a schedule scan while
* it reports urb completions. this flag guards against bogus
if (ehci->scanning)
return;
ehci->scanning = 1;
- scan_async (ehci, regs);
+ scan_async (ehci);
if (ehci->next_uframe != -1)
- scan_periodic (ehci, regs);
+ scan_periodic (ehci);
ehci->scanning = 0;
/* the IO watchdog guards against hardware or driver bugs that
/* no more interrupts ... */
del_timer_sync (&ehci->watchdog);
- del_timer_sync (&ehci->iaa_watchdog);
spin_lock_irq(&ehci->lock);
if (HC_IS_RUNNING (hcd->state))
/* root hub is shut down separately (first, when possible) */
spin_lock_irq (&ehci->lock);
if (ehci->async)
- ehci_work (ehci, NULL);
+ ehci_work (ehci);
spin_unlock_irq (&ehci->lock);
ehci_mem_cleanup (ehci);
ehci->watchdog.function = ehci_watchdog;
ehci->watchdog.data = (unsigned long) ehci;
- init_timer(&ehci->iaa_watchdog);
- ehci->iaa_watchdog.function = ehci_iaa_watchdog;
- ehci->iaa_watchdog.data = (unsigned long) ehci;
-
/*
* hw default: 1K periodic list heads, one per frame.
* periodic_size can shrink by USBCMD update if hcc_params allows.
ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
ehci->reclaim = NULL;
+ ehci->reclaim_ready = 0;
ehci->next_uframe = -1;
/*
temp = HC_VERSION(readl (&ehci->caps->hc_capbase));
ehci_info (ehci,
- "USB %x.%x started, EHCI %x.%02x, driver %s\n",
+ "USB %x.%x started, EHCI %x.%02x, driver %s%s\n",
((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
- temp >> 8, temp & 0xff, DRIVER_VERSION);
+ temp >> 8, temp & 0xff, DRIVER_VERSION,
+ ignore_oc ? ", overcurrent ignored" : "");
writel (INTR_MASK, &ehci->regs->intr_enable); /* Turn On Interrupts */
/*-------------------------------------------------------------------------*/
-static irqreturn_t ehci_irq (struct usb_hcd *hcd, struct pt_regs *regs)
+static irqreturn_t ehci_irq (struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
u32 status;
/* complete the unlinking of some qh [4.15.2.3] */
if (status & STS_IAA) {
COUNT (ehci->stats.reclaim);
- end_unlink_async (ehci, regs);
+ ehci->reclaim_ready = 1;
bh = 1;
}
unsigned i = HCS_N_PORTS (ehci->hcs_params);
/* resume root hub? */
- status = readl (&ehci->regs->command);
- if (!(status & CMD_RUN))
- writel (status | CMD_RUN, &ehci->regs->command);
+ if (!(readl(&ehci->regs->command) & CMD_RUN))
+ usb_hcd_resume_root_hub(hcd);
while (i--) {
int pstatus = readl (&ehci->regs->port_status [i]);
*/
ehci->reset_done [i] = jiffies + msecs_to_jiffies (20);
ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
- usb_hcd_resume_root_hub(hcd);
}
}
}
if (bh)
- ehci_work (ehci, regs);
+ ehci_work (ehci);
spin_unlock (&ehci->lock);
return IRQ_HANDLED;
}
static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
{
- // BUG_ON(qh->qh_state != QH_STATE_LINKED);
-
- /* failfast */
- if (!HC_IS_RUNNING (ehci_to_hcd(ehci)->state))
- end_unlink_async (ehci, NULL);
-
- /* defer till later if busy */
- else if (ehci->reclaim) {
+ /* if we need to use IAA and it's busy, defer */
+ if (qh->qh_state == QH_STATE_LINKED
+ && ehci->reclaim
+ && HC_IS_RUNNING (ehci_to_hcd(ehci)->state)) {
struct ehci_qh *last;
for (last = ehci->reclaim;
qh->qh_state = QH_STATE_UNLINK_WAIT;
last->reclaim = qh;
- /* start IAA cycle */
- } else
+ /* bypass IAA if the hc can't care */
+ } else if (!HC_IS_RUNNING (ehci_to_hcd(ehci)->state) && ehci->reclaim)
+ end_unlink_async (ehci);
+
+ /* something else might have unlinked the qh by now */
+ if (qh->qh_state == QH_STATE_LINKED)
start_unlink_async (ehci, qh);
}
qh = (struct ehci_qh *) urb->hcpriv;
if (!qh)
break;
- switch (qh->qh_state) {
- case QH_STATE_LINKED:
- case QH_STATE_COMPLETING:
- unlink_async (ehci, qh);
- break;
- case QH_STATE_UNLINK:
- case QH_STATE_UNLINK_WAIT:
- /* already started */
- break;
- case QH_STATE_IDLE:
- WARN_ON(1);
- break;
- }
+ unlink_async (ehci, qh);
break;
case PIPE_INTERRUPT:
intr_deschedule (ehci, qh);
/* FALL THROUGH */
case QH_STATE_IDLE:
- qh_completions (ehci, qh, NULL);
+ qh_completions (ehci, qh);
break;
default:
ehci_dbg (ehci, "bogus qh %p state %d\n",
unlink_async (ehci, qh);
/* FALL THROUGH */
case QH_STATE_UNLINK: /* wait for hw to finish? */
- case QH_STATE_UNLINK_WAIT:
idle_timeout:
spin_unlock_irqrestore (&ehci->lock, flags);
schedule_timeout_uninterruptible(1);
projects / linux-2.6-omap-h63xx.git / blobdiff