USB driver fixes

SVN-Revision: 9513

1 files changed, 5 insertions, 359 deletions

diff --git a/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c b/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c
index dc1a4a52d7..48e61e9880 100644
--- a/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c
+++ b/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c
@@ -58,7 +58,7 @@
 /*-------------------------------------------------------------------------*/
 
 /* hcd->hub_irq_enable() */
-static void admhc_rhsc_enable(struct usb_hcd *hcd)
+static void admhc_hub_irq_enable(struct usb_hcd *hcd)
 {
 	struct admhcd	*ahcd = hcd_to_admhcd(hcd);
 
@@ -69,360 +69,6 @@ static void admhc_rhsc_enable(struct usb_hcd *hcd)
 	spin_unlock_irq(&ahcd->lock);
 }
 
-#define OHCI_SCHED_ENABLES \
-	(OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
-
-#ifdef	CONFIG_PM
-static int admhc_restart(struct admhcd *ahcd);
-
-static int admhc_rh_suspend(struct admhcd *ahcd, int autostop)
-__releases(ahcd->lock)
-__acquires(ahcd->lock)
-{
-	int			status = 0;
-
-	ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
-	switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
-	case OHCI_USB_RESUME:
-		admhc_dbg(ahcd, "resume/suspend?\n");
-		ahcd->hc_control &= ~OHCI_CTRL_HCFS;
-		ahcd->hc_control |= OHCI_USB_RESET;
-		admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
-		(void) admhc_readl(ahcd, &ahcd->regs->control);
-		/* FALL THROUGH */
-	case OHCI_USB_RESET:
-		status = -EBUSY;
-		admhc_dbg(ahcd, "needs reinit!\n");
-		goto done;
-	case OHCI_USB_SUSPEND:
-		if (!ahcd->autostop) {
-			admhc_dbg(ahcd, "already suspended\n");
-			goto done;
-		}
-	}
-	admhc_dbg(ahcd, "%s root hub\n",
-			autostop ? "auto-stop" : "suspend");
-
-	/* First stop any processing */
-	if (!autostop && (ahcd->hc_control & OHCI_SCHED_ENABLES)) {
-		ahcd->hc_control &= ~OHCI_SCHED_ENABLES;
-		admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
-		ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
-		admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->intrstatus);
-
-		/* sched disables take effect on the next frame,
-		 * then the last WDH could take 6+ msec
-		 */
-		admhc_dbg(ahcd, "stopping schedules ...\n");
-		ahcd->autostop = 0;
-		spin_unlock_irq (&ahcd->lock);
-		msleep (8);
-		spin_lock_irq (&ahcd->lock);
-	}
-	dl_done_list (ahcd);
-	finish_unlinks (ahcd, admhc_frame_no(ahcd));
-
-	/* maybe resume can wake root hub */
-	if (device_may_wakeup(&admhcd_to_hcd(ahcd)->self.root_hub->dev) ||
-			autostop)
-		ahcd->hc_control |= OHCI_CTRL_RWE;
-	else {
-		admhc_writel(ahcd, OHCI_INTR_RHSC, &ahcd->regs->intrdisable);
-		ahcd->hc_control &= ~OHCI_CTRL_RWE;
-	}
-
-	/* Suspend hub ... this is the "global (to this bus) suspend" mode,
-	 * which doesn't imply ports will first be individually suspended.
-	 */
-	ahcd->hc_control &= ~OHCI_CTRL_HCFS;
-	ahcd->hc_control |= OHCI_USB_SUSPEND;
-	admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
-	(void) admhc_readl(ahcd, &ahcd->regs->control);
-
-	/* no resumes until devices finish suspending */
-	if (!autostop) {
-		ahcd->next_statechange = jiffies + msecs_to_jiffies (5);
-		ahcd->autostop = 0;
-	}
-
-done:
-	return status;
-}
-
-static inline struct ed *find_head(struct ed *ed)
-{
-	/* for bulk and control lists */
-	while (ed->ed_prev)
-		ed = ed->ed_prev;
-	return ed;
-}
-
-/* caller has locked the root hub */
-static int admhc_rh_resume(struct admhcd *ahcd)
-__releases(ahcd->lock)
-__acquires(ahcd->lock)
-{
-	struct usb_hcd		*hcd = admhcd_to_hcd (ahcd);
-	u32			temp, enables;
-	int			status = -EINPROGRESS;
-	int			autostopped = ahcd->autostop;
-
-	ahcd->autostop = 0;
-	ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
-
-	if (ahcd->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
-		/* this can happen after resuming a swsusp snapshot */
-		if (hcd->state == HC_STATE_RESUMING) {
-			admhc_dbg(ahcd, "BIOS/SMM active, control %03x\n",
-					ahcd->hc_control);
-			status = -EBUSY;
-		/* this happens when pmcore resumes HC then root */
-		} else {
-			admhc_dbg(ahcd, "duplicate resume\n");
-			status = 0;
-		}
-	} else switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
-	case OHCI_USB_SUSPEND:
-		ahcd->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES);
-		ahcd->hc_control |= OHCI_USB_RESUME;
-		admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
-		(void) admhc_readl(ahcd, &ahcd->regs->control);
-		admhc_dbg(ahcd, "%s root hub\n",
-				autostopped ? "auto-start" : "resume");
-		break;
-	case OHCI_USB_RESUME:
-		/* HCFS changes sometime after INTR_RD */
-		admhc_dbg(ahcd, "%swakeup root hub\n",
-				autostopped ? "auto-" : "");
-		break;
-	case OHCI_USB_OPER:
-		/* this can happen after resuming a swsusp snapshot */
-		admhc_dbg(ahcd, "snapshot resume? reinit\n");
-		status = -EBUSY;
-		break;
-	default:		/* RESET, we lost power */
-		admhc_dbg(ahcd, "lost power\n");
-		status = -EBUSY;
-	}
-	if (status == -EBUSY) {
-		if (!autostopped) {
-			spin_unlock_irq (&ahcd->lock);
-			(void) ahcd_init (ahcd);
-			status = admhc_restart (ahcd);
-			spin_lock_irq (&ahcd->lock);
-		}
-		return status;
-	}
-	if (status != -EINPROGRESS)
-		return status;
-	if (autostopped)
-		goto skip_resume;
-	spin_unlock_irq (&ahcd->lock);
-
-	/* Some controllers (lucent erratum) need extra-long delays */
-	msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1);
-
-	temp = admhc_readl(ahcd, &ahcd->regs->control);
-	temp &= OHCI_CTRL_HCFS;
-	if (temp != OHCI_USB_RESUME) {
-		admhc_err (ahcd, "controller won't resume\n");
-		spin_lock_irq(&ahcd->lock);
-		return -EBUSY;
-	}
-
-	/* disable old schedule state, reinit from scratch */
-	admhc_writel(ahcd, 0, &ahcd->regs->ed_controlhead);
-	admhc_writel(ahcd, 0, &ahcd->regs->ed_controlcurrent);
-	admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkhead);
-	admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkcurrent);
-	admhc_writel(ahcd, 0, &ahcd->regs->ed_periodcurrent);
-	admhc_writel(ahcd, (u32) ahcd->hcca_dma, &ahcd->ahcd->regs->hcca);
-
-	/* Sometimes PCI D3 suspend trashes frame timings ... */
-	periodic_reinit(ahcd);
-
-	/* the following code is executed with ahcd->lock held and
-	 * irqs disabled if and only if autostopped is true
-	 */
-
-skip_resume:
-	/* interrupts might have been disabled */
-	admhc_writel(ahcd, OHCI_INTR_INIT, &ahcd->regs->int_enable);
-	if (ahcd->ed_rm_list)
-		admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->int_enable);
-
-	/* Then re-enable operations */
-	admhc_writel(ahcd, OHCI_USB_OPER, &ahcd->regs->control);
-	(void) admhc_readl(ahcd, &ahcd->regs->control);
-	if (!autostopped)
-		msleep (3);
-
-	temp = ahcd->hc_control;
-	temp &= OHCI_CTRL_RWC;
-	temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
-	ahcd->hc_control = temp;
-	admhc_writel(ahcd, temp, &ahcd->regs->control);
-	(void) admhc_readl(ahcd, &ahcd->regs->control);
-
-	/* TRSMRCY */
-	if (!autostopped) {
-		msleep (10);
-		spin_lock_irq (&ahcd->lock);
-	}
-	/* now ahcd->lock is always held and irqs are always disabled */
-
-	/* keep it alive for more than ~5x suspend + resume costs */
-	ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
-
-	/* maybe turn schedules back on */
-	enables = 0;
-	temp = 0;
-	if (!ahcd->ed_rm_list) {
-		if (ahcd->ed_controltail) {
-			admhc_writel(ahcd,
-					find_head (ahcd->ed_controltail)->dma,
-					&ahcd->regs->ed_controlhead);
-			enables |= OHCI_CTRL_CLE;
-			temp |= OHCI_CLF;
-		}
-		if (ahcd->ed_bulktail) {
-			admhc_writel(ahcd, find_head (ahcd->ed_bulktail)->dma,
-				&ahcd->regs->ed_bulkhead);
-			enables |= OHCI_CTRL_BLE;
-			temp |= OHCI_BLF;
-		}
-	}
-	if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs)
-		enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
-	if (enables) {
-		admhc_dbg(ahcd, "restarting schedules ... %08x\n", enables);
-		ahcd->hc_control |= enables;
-		admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
-		if (temp)
-			admhc_writel(ahcd, temp, &ahcd->regs->cmdstatus);
-		(void) admhc_readl(ahcd, &ahcd->regs->control);
-	}
-
-	return 0;
-}
-
-static int admhc_bus_suspend(struct usb_hcd *hcd)
-{
-	struct admhcd	*ahcd = hcd_to_admhcd(hcd);
-	int		rc;
-
-	spin_lock_irq(&ahcd->lock);
-
-	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
-		rc = -ESHUTDOWN;
-	else
-		rc = admhc_rh_suspend (ahcd, 0);
-	spin_unlock_irq(&ahcd->lock);
-	return rc;
-}
-
-static int admhc_bus_resume(struct usb_hcd *hcd)
-{
-	struct admhcd		*ahcd = hcd_to_admhcd(hcd);
-	int			rc;
-
-	if (time_before(jiffies, ahcd->next_statechange))
-		msleep(5);
-
-	spin_lock_irq (&ahcd->lock);
-
-	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
-		rc = -ESHUTDOWN;
-	else
-		rc = admhc_rh_resume (ahcd);
-	spin_unlock_irq(&ahcd->lock);
-
-	/* poll until we know a device is connected or we autostop */
-	if (rc == 0)
-		usb_hcd_poll_rh_status(hcd);
-	return rc;
-}
-
-/* Carry out polling-, autostop-, and autoresume-related state changes */
-static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed,
-		int any_connected)
-{
-	int	poll_rh = 1;
-
-	switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
-
-	case OHCI_USB_OPER:
-		/* keep on polling until we know a device is connected
-		 * and RHSC is enabled */
-		if (!ahcd->autostop) {
-			if (any_connected ||
-					!device_may_wakeup(&admhcd_to_hcd(ahcd)
-						->self.root_hub->dev)) {
-				if (admhc_readl(ahcd, &ahcd->regs->int_enable) &
-						OHCI_INTR_RHSC)
-					poll_rh = 0;
-			} else {
-				ahcd->autostop = 1;
-				ahcd->next_statechange = jiffies + HZ;
-			}
-
-		/* if no devices have been attached for one second, autostop */
-		} else {
-			if (changed || any_connected) {
-				ahcd->autostop = 0;
-				ahcd->next_statechange = jiffies +
-						STATECHANGE_DELAY;
-			} else if (time_after_eq(jiffies,
-						ahcd->next_statechange)
-					&& !ahcd->ed_rm_list
-					&& !(ahcd->hc_control &
-						OHCI_SCHED_ENABLES)) {
-				ahcd_rh_suspend(ahcd, 1);
-			}
-		}
-		break;
-
-	/* if there is a port change, autostart or ask to be resumed */
-	case OHCI_USB_SUSPEND:
-	case OHCI_USB_RESUME:
-		if (changed) {
-			if (ahcd->autostop)
-				admhc_rh_resume(ahcd);
-			else
-				usb_hcd_resume_root_hub(admhcd_to_hcd(ahcd));
-		} else {
-			/* everything is idle, no need for polling */
-			poll_rh = 0;
-		}
-		break;
-	}
-	return poll_rh;
-}
-
-#else	/* CONFIG_PM */
-
-static inline int admhc_rh_resume(struct admhcd *ahcd)
-{
-	return 0;
-}
-
-/* Carry out polling-related state changes.
- * autostop isn't used when CONFIG_PM is turned off.
- */
-static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed,
-		int any_connected)
-{
-	int	poll_rh = 1;
-
-	/* keep on polling until RHSC is enabled */
-	if (admhc_readl(ahcd, &ahcd->regs->int_enable) & ADMHC_INTR_INSM)
-		poll_rh = 0;
-
-	return poll_rh;
-}
-
-#endif	/* CONFIG_PM */
-
 /*-------------------------------------------------------------------------*/
 
 /* build "status change" packet (one or two bytes) from HC registers */
@@ -647,7 +293,7 @@ static int admhc_hub_control (
 	struct admhcd	*ahcd = hcd_to_admhcd(hcd);
 	int		ports = hcd_to_bus (hcd)->root_hub->maxchild;
 	u32		temp;
-	int		retval = 0;
+	int		ret = 0;
 
 	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
 		return -ESHUTDOWN;
@@ -753,7 +399,7 @@ static int admhc_hub_control (
 				&ahcd->regs->portstatus[wIndex]);
 			break;
 		case USB_PORT_FEAT_RESET:
-			retval = root_port_reset(ahcd, wIndex);
+			ret = root_port_reset(ahcd, wIndex);
 			break;
 		default:
 			goto error;
@@ -763,8 +409,8 @@ static int admhc_hub_control (
 	default:
 error:
 		/* "protocol stall" on error */
-		retval = -EPIPE;
+		ret = -EPIPE;
 	}
-	return retval;
+	return ret;
 }