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path: root/drivers/usb/host/ehci-hcd.c
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Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
-rw-r--r--drivers/usb/host/ehci-hcd.c159
1 files changed, 118 insertions, 41 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 5f2d74ed5ad7..4caa6a8b9a37 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -33,6 +33,7 @@
#include <linux/usb.h>
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>
+#include <linux/debugfs.h>
#include "../core/hcd.h"
@@ -109,7 +110,7 @@ static const char hcd_name [] = "ehci_hcd";
#define EHCI_TUNE_MULT_TT 1
#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
-#define EHCI_IAA_JIFFIES (HZ/100) /* arbitrary; ~10 msec */
+#define EHCI_IAA_MSECS 10 /* arbitrary */
#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 */
@@ -266,6 +267,7 @@ static void ehci_quiesce (struct ehci_hcd *ehci)
/*-------------------------------------------------------------------------*/
+static void end_unlink_async(struct ehci_hcd *ehci);
static void ehci_work(struct ehci_hcd *ehci);
#include "ehci-hub.c"
@@ -275,25 +277,41 @@ static void ehci_work(struct ehci_hcd *ehci);
/*-------------------------------------------------------------------------*/
-static void ehci_watchdog (unsigned long param)
+static void ehci_iaa_watchdog(unsigned long param)
{
struct ehci_hcd *ehci = (struct ehci_hcd *) param;
unsigned long flags;
+ u32 status, cmd;
spin_lock_irqsave (&ehci->lock, flags);
+ WARN_ON(!ehci->reclaim);
- /* lost IAA irqs wedge things badly; seen with a vt8235 */
+ status = ehci_readl(ehci, &ehci->regs->status);
+ cmd = ehci_readl(ehci, &ehci->regs->command);
+ ehci_dbg(ehci, "IAA watchdog: status %x cmd %x\n", status, cmd);
+
+ /* lost IAA irqs wedge things badly; seen first with a vt8235 */
if (ehci->reclaim) {
- u32 status = ehci_readl(ehci, &ehci->regs->status);
if (status & STS_IAA) {
ehci_vdbg (ehci, "lost IAA\n");
COUNT (ehci->stats.lost_iaa);
ehci_writel(ehci, STS_IAA, &ehci->regs->status);
- ehci->reclaim_ready = 1;
}
+ ehci_writel(ehci, cmd & ~CMD_IAAD, &ehci->regs->command);
+ end_unlink_async(ehci);
}
- /* stop async processing after it's idled a bit */
+ 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 */
if (test_bit (TIMER_ASYNC_OFF, &ehci->actions))
start_unlink_async (ehci, ehci->async);
@@ -363,8 +381,6 @@ static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
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
@@ -399,6 +415,7 @@ static void ehci_stop (struct usb_hcd *hcd)
/* 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))
@@ -447,6 +464,10 @@ static int ehci_init(struct usb_hcd *hcd)
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.
@@ -463,7 +484,6 @@ static int ehci_init(struct usb_hcd *hcd)
ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
ehci->reclaim = NULL;
- ehci->reclaim_ready = 0;
ehci->next_uframe = -1;
/*
@@ -654,8 +674,7 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd)
/* complete the unlinking of some qh [4.15.2.3] */
if (status & STS_IAA) {
COUNT (ehci->stats.reclaim);
- ehci->reclaim_ready = 1;
- bh = 1;
+ end_unlink_async(ehci);
}
/* remote wakeup [4.3.1] */
@@ -761,10 +780,16 @@ static int ehci_urb_enqueue (
static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
{
- /* 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)) {
+ /* failfast */
+ if (!HC_IS_RUNNING(ehci_to_hcd(ehci)->state))
+ end_unlink_async(ehci);
+
+ /* if it's not linked then there's nothing to do */
+ if (qh->qh_state != QH_STATE_LINKED)
+ ;
+
+ /* defer till later if busy */
+ else if (ehci->reclaim) {
struct ehci_qh *last;
for (last = ehci->reclaim;
@@ -774,12 +799,8 @@ static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
qh->qh_state = QH_STATE_UNLINK_WAIT;
last->reclaim = qh;
- /* 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 IAA cycle */
+ } else
start_unlink_async (ehci, qh);
}
@@ -806,7 +827,19 @@ static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
qh = (struct ehci_qh *) urb->hcpriv;
if (!qh)
break;
- unlink_async (ehci, qh);
+ 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;
+ }
break;
case PIPE_INTERRUPT:
@@ -829,16 +862,16 @@ static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
/* reschedule QH iff another request is queued */
if (!list_empty (&qh->qtd_list)
&& HC_IS_RUNNING (hcd->state)) {
- int status;
+ int schedule_status;
- status = qh_schedule (ehci, qh);
+ schedule_status = qh_schedule (ehci, qh);
spin_unlock_irqrestore (&ehci->lock, flags);
- if (status != 0) {
+ if (schedule_status != 0) {
// shouldn't happen often, but ...
// FIXME kill those tds' urbs
err ("can't reschedule qh %p, err %d",
- qh, status);
+ qh, schedule_status);
}
return status;
}
@@ -898,6 +931,7 @@ rescan:
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);
@@ -959,11 +993,26 @@ MODULE_LICENSE ("GPL");
#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
#endif
-#ifdef CONFIG_440EPX
+#if defined(CONFIG_440EPX) && !defined(CONFIG_PPC_MERGE)
#include "ehci-ppc-soc.c"
#define PLATFORM_DRIVER ehci_ppc_soc_driver
#endif
+#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
+#include "ehci-ppc-of.c"
+#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver
+#endif
+
+#ifdef CONFIG_ARCH_ORION
+#include "ehci-orion.c"
+#define PLATFORM_DRIVER ehci_orion_driver
+#endif
+
+#ifdef CONFIG_ARCH_IXP4XX
+#include "ehci-ixp4xx.c"
+#define PLATFORM_DRIVER ixp4xx_ehci_driver
+#endif
+
#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
!defined(PS3_SYSTEM_BUS_DRIVER)
#error "missing bus glue for ehci-hcd"
@@ -978,41 +1027,66 @@ static int __init ehci_hcd_init(void)
sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
+#ifdef DEBUG
+ ehci_debug_root = debugfs_create_dir("ehci", NULL);
+ if (!ehci_debug_root)
+ return -ENOENT;
+#endif
+
#ifdef PLATFORM_DRIVER
retval = platform_driver_register(&PLATFORM_DRIVER);
if (retval < 0)
- return retval;
+ goto clean0;
#endif
#ifdef PCI_DRIVER
retval = pci_register_driver(&PCI_DRIVER);
- if (retval < 0) {
-#ifdef PLATFORM_DRIVER
- platform_driver_unregister(&PLATFORM_DRIVER);
-#endif
- return retval;
- }
+ if (retval < 0)
+ goto clean1;
#endif
#ifdef PS3_SYSTEM_BUS_DRIVER
retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
- if (retval < 0) {
-#ifdef PLATFORM_DRIVER
- platform_driver_unregister(&PLATFORM_DRIVER);
+ if (retval < 0)
+ goto clean2;
+#endif
+
+#ifdef OF_PLATFORM_DRIVER
+ retval = of_register_platform_driver(&OF_PLATFORM_DRIVER);
+ if (retval < 0)
+ goto clean3;
+#endif
+ return retval;
+
+#ifdef OF_PLATFORM_DRIVER
+ /* of_unregister_platform_driver(&OF_PLATFORM_DRIVER); */
+clean3:
+#endif
+#ifdef PS3_SYSTEM_BUS_DRIVER
+ ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
+clean2:
#endif
#ifdef PCI_DRIVER
- pci_unregister_driver(&PCI_DRIVER);
+ pci_unregister_driver(&PCI_DRIVER);
+clean1:
#endif
- return retval;
- }
+#ifdef PLATFORM_DRIVER
+ platform_driver_unregister(&PLATFORM_DRIVER);
+clean0:
+#endif
+#ifdef DEBUG
+ debugfs_remove(ehci_debug_root);
+ ehci_debug_root = NULL;
#endif
-
return retval;
}
module_init(ehci_hcd_init);
static void __exit ehci_hcd_cleanup(void)
{
+#ifdef OF_PLATFORM_DRIVER
+ of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
+#endif
#ifdef PLATFORM_DRIVER
platform_driver_unregister(&PLATFORM_DRIVER);
#endif
@@ -1022,6 +1096,9 @@ static void __exit ehci_hcd_cleanup(void)
#ifdef PS3_SYSTEM_BUS_DRIVER
ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
#endif
+#ifdef DEBUG
+ debugfs_remove(ehci_debug_root);
+#endif
}
module_exit(ehci_hcd_cleanup);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 03:54:10 +0000