During babble condition both first disconnect of devices are
initiated. Make sure MUSB controller is reset and re-initialized
after all disconnects.
To acheive this schedule a delayed work for babble recovery.
While at that convert udelay to usleep_range.
Refer Documentation/timers/timers-howto.txt
Signed-off-by: George Cherian <george.cher...@ti.com>
---
drivers/usb/musb/musb_core.c | 15 ++++++++-------
drivers/usb/musb/musb_core.h | 2 +-
2 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 0ad9551..c0ce09f 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -850,7 +850,8 @@ b_host:
/* handle babble condition */
if (int_usb & MUSB_INTR_BABBLE && is_host_active(musb))
- schedule_work(&musb->recover_work);
+ schedule_delayed_work(&musb->recover_work,
+ msecs_to_jiffies(100));
#if 0
/* REVISIT ... this would be for multiplexing periodic endpoints, or
@@ -1751,16 +1752,16 @@ static void musb_irq_work(struct work_struct *data)
/* Recover from babble interrupt conditions */
static void musb_recover_work(struct work_struct *data)
{
- struct musb *musb = container_of(data, struct musb, recover_work);
+ struct musb *musb = container_of(data, struct musb, recover_work.work);
int status;
musb_platform_reset(musb);
usb_phy_vbus_off(musb->xceiv);
- udelay(100);
+ usleep_range(100, 200);
usb_phy_vbus_on(musb->xceiv);
- udelay(100);
+ usleep_range(100, 200);
/*
* When a babble condition occurs, the musb controller removes the
@@ -1943,7 +1944,7 @@ musb_init_controller(struct device *dev, int nIrq, void
__iomem *ctrl)
/* Init IRQ workqueue before request_irq */
INIT_WORK(&musb->irq_work, musb_irq_work);
- INIT_WORK(&musb->recover_work, musb_recover_work);
+ INIT_DELAYED_WORK(&musb->recover_work, musb_recover_work);
INIT_DELAYED_WORK(&musb->deassert_reset_work, musb_deassert_reset);
INIT_DELAYED_WORK(&musb->finish_resume_work, musb_host_finish_resume);
@@ -2039,7 +2040,7 @@ fail4:
fail3:
cancel_work_sync(&musb->irq_work);
- cancel_work_sync(&musb->recover_work);
+ cancel_delayed_work_sync(&musb->recover_work);
cancel_delayed_work_sync(&musb->finish_resume_work);
cancel_delayed_work_sync(&musb->deassert_reset_work);
if (musb->dma_controller)
@@ -2105,7 +2106,7 @@ static int musb_remove(struct platform_device *pdev)
dma_controller_destroy(musb->dma_controller);
cancel_work_sync(&musb->irq_work);
- cancel_work_sync(&musb->recover_work);
+ cancel_delayed_work_sync(&musb->recover_work);
cancel_delayed_work_sync(&musb->finish_resume_work);
cancel_delayed_work_sync(&musb->deassert_reset_work);
musb_free(musb);
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index d155a15..9241025 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -297,7 +297,7 @@ struct musb {
irqreturn_t (*isr)(int, void *);
struct work_struct irq_work;
- struct work_struct recover_work;
+ struct delayed_work recover_work;
struct delayed_work deassert_reset_work;
struct delayed_work finish_resume_work;
u16 hwvers;
--
1.8.3.1
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