5 files changed, 0 insertions, 215 deletions

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index c4e15ed1405a..35cdba10411b 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -275,58 +275,6 @@ static void ehci_work(struct ehci_hcd *ehci);
 
 /*-------------------------------------------------------------------------*/
 
-#ifdef CONFIG_CPU_FREQ
-
-#include <linux/cpufreq.h>
-
-static void ehci_cpufreq_pause (struct ehci_hcd *ehci)
-{
-	unsigned long	flags;
-
-	spin_lock_irqsave(&ehci->lock, flags);
-	if (!ehci->cpufreq_changing++)
-		qh_inactivate_split_intr_qhs(ehci);
-	spin_unlock_irqrestore(&ehci->lock, flags);
-}
-
-static void ehci_cpufreq_unpause (struct ehci_hcd *ehci)
-{
-	unsigned long	flags;
-
-	spin_lock_irqsave(&ehci->lock, flags);
-	if (!--ehci->cpufreq_changing)
-		qh_reactivate_split_intr_qhs(ehci);
-	spin_unlock_irqrestore(&ehci->lock, flags);
-}
-
-/*
- * ehci_cpufreq_notifier is needed to avoid MMF errors that occur when
- * EHCI controllers that don't cache many uframes get delayed trying to
- * read main memory during CPU frequency transitions.  This can cause
- * split interrupt transactions to not be completed in the required uframe.
- * This has been observed on the Broadcom/ServerWorks HT1000 controller.
- */
-static int ehci_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
-				 void *data)
-{
-	struct ehci_hcd *ehci = container_of(nb, struct ehci_hcd,
-					     cpufreq_transition);
-
-	switch (val) {
-	case CPUFREQ_PRECHANGE:
-		ehci_cpufreq_pause(ehci);
-		break;
-	case CPUFREQ_POSTCHANGE:
-		ehci_cpufreq_unpause(ehci);
-		break;
-	}
-	return 0;
-}
-
-#endif
-
-/*-------------------------------------------------------------------------*/
-
 static void ehci_watchdog (unsigned long param)
 {
 	struct ehci_hcd		*ehci = (struct ehci_hcd *) param;
@@ -460,10 +408,6 @@ static void ehci_stop (struct usb_hcd *hcd)
 	ehci_writel(ehci, 0, &ehci->regs->intr_enable);
 	spin_unlock_irq(&ehci->lock);
 
-#ifdef CONFIG_CPU_FREQ
-	cpufreq_unregister_notifier(&ehci->cpufreq_transition,
-				    CPUFREQ_TRANSITION_NOTIFIER);
-#endif
 	/* let companion controllers work when we aren't */
 	ehci_writel(ehci, 0, &ehci->regs->configured_flag);
 
@@ -569,17 +513,6 @@ static int ehci_init(struct usb_hcd *hcd)
 	}
 	ehci->command = temp;
 
-#ifdef CONFIG_CPU_FREQ
-	INIT_LIST_HEAD(&ehci->split_intr_qhs);
-	/*
-	 * If the EHCI controller caches enough uframes, this probably
-	 * isn't needed unless there are so many low/full speed devices
-	 * that the controller's can't cache it all.
-	 */
-	ehci->cpufreq_transition.notifier_call = ehci_cpufreq_notifier;
-	cpufreq_register_notifier(&ehci->cpufreq_transition,
-				  CPUFREQ_TRANSITION_NOTIFIER);
-#endif
 	return 0;
 }
 
diff --git a/drivers/usb/host/ehci-mem.c b/drivers/usb/host/ehci-mem.c
index 8816d09903d0..0431397836f6 100644
--- a/drivers/usb/host/ehci-mem.c
+++ b/drivers/usb/host/ehci-mem.c
@@ -94,9 +94,6 @@ static struct ehci_qh *ehci_qh_alloc (struct ehci_hcd *ehci, gfp_t flags)
 	qh->qh_dma = dma;
 	// INIT_LIST_HEAD (&qh->qh_list);
 	INIT_LIST_HEAD (&qh->qtd_list);
-#ifdef CONFIG_CPU_FREQ
-	INIT_LIST_HEAD (&qh->split_intr_qhs);
-#endif
 
 	/* dummy td enables safe urb queuing */
 	qh->dummy = ehci_qtd_alloc (ehci, flags);
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 2284028f8aa5..140bfa423e07 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -312,10 +312,6 @@ qh_completions (struct ehci_hcd *ehci, struct ehci_qh *qh)
 		struct urb	*urb;
 		u32		token = 0;
 
-		/* ignore QHs that are currently inactive */
-		if (qh->hw_info1 & __constant_cpu_to_le32(QH_INACTIVATE))
-			break;
-
 		qtd = list_entry (entry, struct ehci_qtd, qtd_list);
 		urb = qtd->urb;
 
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index d4a8ace49676..e682f2342ef8 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -479,109 +479,6 @@ static int disable_periodic (struct ehci_hcd *ehci)
 }
 
 /*-------------------------------------------------------------------------*/
-#ifdef CONFIG_CPU_FREQ
-
-static int safe_to_modify_i (struct ehci_hcd *ehci, struct ehci_qh *qh)
-{
-	int now; /* current (frame * 8) + uframe */
-	int prev_start, next_start; /* uframes from/to split start */
-	int start_uframe = ffs(le32_to_cpup (&qh->hw_info2) & QH_SMASK);
-	int end_uframe = fls((le32_to_cpup (&qh->hw_info2) & QH_CMASK) >> 8);
-	int split_duration = end_uframe - start_uframe;
-
-	now = readl(&ehci->regs->frame_index) % (ehci->periodic_size << 3);
-
-	next_start = ((1024 << 3) + (qh->start << 3) + start_uframe - now)
-			% (qh->period << 3);
-	prev_start = (qh->period << 3) - next_start;
-
-	/*
-	 * Make sure there will be at least one uframe when qh is safe.
-	 */
-	if ((qh->period << 3) <= (ehci->i_thresh + 2 + split_duration))
-		/* never safe */
-		return -EINVAL;
-
-	/*
-	 * Wait 1 uframe after transaction should have started, to make
-	 * sure controller has time to write back overlay, so we can
-	 * check QTD_STS_STS to see if transaction is in progress.
-	 */
-	if ((next_start > ehci->i_thresh) && (prev_start > 1))
-		/* safe to set "i" bit if split isn't in progress */
-		return (qh->hw_token & STATUS_BIT(ehci)) ? 0 : 1;
-	else
-		return 0;
-}
-
-/* Set inactivate bit for all the split interrupt QHs. */
-static void qh_inactivate_split_intr_qhs (struct ehci_hcd *ehci)
-{
-	struct ehci_qh	*qh;
-	int		not_done, safe;
-	u32		inactivate = INACTIVATE_BIT(ehci);
-	u32		active = ACTIVE_BIT(ehci);
-
-	do {
-		not_done = 0;
-		list_for_each_entry(qh, &ehci->split_intr_qhs,
-				split_intr_qhs) {
-			if (qh->hw_info1 & inactivate)
-				/* already off */
-				continue;
-			/*
-			 * To avoid setting "I" after the start split happens,
-			 * don't set it if the QH might be cached in the
-			 * controller.  Some HCs (Broadcom/ServerWorks HT1000)
-			 * will stop in the middle of a split transaction when
-			 * the "I" bit is set.
-			 */
-			safe = safe_to_modify_i(ehci, qh);
-			if (safe == 0) {
-				not_done = 1;
-			} else if (safe > 0) {
-				qh->was_active = qh->hw_token & active;
-				qh->hw_info1 |= inactivate;
-			}
-		}
-	} while (not_done);
-	wmb();
-}
-
-static void qh_reactivate_split_intr_qhs (struct ehci_hcd *ehci)
-{
-	struct ehci_qh	*qh;
-	u32		token;
-	int		not_done, safe;
-	u32		inactivate = INACTIVATE_BIT(ehci);
-	u32		active = ACTIVE_BIT(ehci);
-	u32		halt = HALT_BIT(ehci);
-
-	do {
-		not_done = 0;
-		list_for_each_entry(qh, &ehci->split_intr_qhs, split_intr_qhs) {
-			if (!(qh->hw_info1 & inactivate)) /* already on */
-				continue;
-			/*
-			 * Don't reactivate if cached, or controller might
-			 * overwrite overlay after we modify it!
-			 */
-			safe = safe_to_modify_i(ehci, qh);
-			if (safe == 0) {
-				not_done = 1;
-			} else if (safe > 0) {
-				/* See EHCI 1.0 section 4.15.2.4. */
-				token = qh->hw_token;
-				qh->hw_token = (token | halt) & ~active;
-				wmb();
-				qh->hw_info1 &= ~inactivate;
-				wmb();
-				qh->hw_token = (token & ~halt) | qh->was_active;
-			}
-		}
-	} while (not_done);
-}
-#endif
 
 /* periodic schedule slots have iso tds (normal or split) first, then a
  * sparse tree for active interrupt transfers.
@@ -599,17 +496,6 @@ static int qh_link_periodic (struct ehci_hcd *ehci, struct ehci_qh *qh)
 		period, hc32_to_cpup(ehci, &qh->hw_info2) & (QH_CMASK | QH_SMASK),
 		qh, qh->start, qh->usecs, qh->c_usecs);
 
-#ifdef CONFIG_CPU_FREQ
-	/*
-	 * If low/full speed interrupt QHs are inactive (because of
-	 * cpufreq changing processor speeds), start QH with I flag set--
-	 * it will automatically be cleared when cpufreq is done.
-	 */
-	if (ehci->cpufreq_changing)
-		if (!(qh->hw_info1 & (cpu_to_le32(1 << 13))))
-			qh->hw_info1 |= INACTIVATE_BIT(ehci);
-#endif
-
 	/* high bandwidth, or otherwise every microframe */
 	if (period == 0)
 		period = 1;
@@ -658,12 +544,6 @@ static int qh_link_periodic (struct ehci_hcd *ehci, struct ehci_qh *qh)
 		? ((qh->usecs + qh->c_usecs) / qh->period)
 		: (qh->usecs * 8);
 
-#ifdef CONFIG_CPU_FREQ
-	/* add qh to list of low/full speed interrupt QHs, if applicable */
-	if (!(qh->hw_info1 & (cpu_to_le32(1 << 13)))) {
-		list_add(&qh->split_intr_qhs, &ehci->split_intr_qhs);
-	}
-#endif
 	/* maybe enable periodic schedule processing */
 	if (!ehci->periodic_sched++)
 		return enable_periodic (ehci);
@@ -683,13 +563,6 @@ static void qh_unlink_periodic (struct ehci_hcd *ehci, struct ehci_qh *qh)
 	// THEN
 	//   qh->hw_info1 |= __constant_cpu_to_hc32(1 << 7 /* "ignore" */);
 
-#ifdef CONFIG_CPU_FREQ
-	/* remove qh from list of low/full speed interrupt QHs */
-	if (!(qh->hw_info1 & (cpu_to_le32(1 << 13)))) {
-		list_del_init(&qh->split_intr_qhs);
-	}
-#endif
-
 	/* high bandwidth, or otherwise part of every microframe */
 	if ((period = qh->period) == 0)
 		period = 1;
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 2c68a04230c1..951d69fec513 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -71,12 +71,6 @@ struct ehci_hcd {			/* one per controller */
 	__u32			hcs_params;	/* cached register copy */
 	spinlock_t		lock;
 
-#ifdef CONFIG_CPU_FREQ
-	struct notifier_block	cpufreq_transition;
-	int			cpufreq_changing;
-	struct list_head	split_intr_qhs;
-#endif
-
 	/* async schedule support */
 	struct ehci_qh		*async;
 	struct ehci_qh		*reclaim;
@@ -439,10 +433,6 @@ struct ehci_qh {
 	__hc32			hw_next;	/* see EHCI 3.6.1 */
 	__hc32			hw_info1;       /* see EHCI 3.6.2 */
 #define	QH_HEAD		0x00008000
-#define	QH_INACTIVATE	0x00000080
-
-#define INACTIVATE_BIT(ehci)	cpu_to_hc32(ehci, QH_INACTIVATE)
-
 	__hc32			hw_info2;        /* see EHCI 3.6.2 */
 #define	QH_SMASK	0x000000ff
 #define	QH_CMASK	0x0000ff00
@@ -492,10 +482,6 @@ struct ehci_qh {
 	unsigned short		start;		/* where polling starts */
 #define NO_FRAME ((unsigned short)~0)			/* pick new start */
 	struct usb_device	*dev;		/* access to TT */
-#ifdef CONFIG_CPU_FREQ
-	struct list_head	split_intr_qhs; /* list of split qhs */
-	__le32			was_active;	/* active bit before "i" set */
-#endif
 } __attribute__ ((aligned (32)));
 
 /*-------------------------------------------------------------------------*/