diff options
| author | Hu hui <b29976@freescale.com> | 2010-10-09 13:40:11 +0800 |
|---|---|---|
| committer | Hu Hui <b29976@freescale.com> | 2010-10-09 14:42:24 +0800 |
| commit | 2293c37431ab42f48bb28b2ff6be9fe00125bee4 (patch) | |
| tree | 3c02649eb1e5b3cf94932b7c22fac96f9ba53dab /drivers/usb/otg | |
| parent | 52bd5df58dad37c994fc2b396c0c9bc20c321cb9 (diff) | |
ENGR00132418-2 I.MX USB ID debounce only needed when wakeup event is present
Driver Part
We do need software ID debounce only when the wakeup event is present
This is becasse that on some boards when an usb device is attached to otg
port,the vbus wakeup event is present earlier than ID pin wakeup
event,but the vbus wakeup event is not expected, So we must delay
with some time (3ms) when wakup event is present to let the ID pin
change to the correct value.
Signed-off-by: Hu Hui <b29976@freescale.com>
Diffstat (limited to 'drivers/usb/otg')
| -rw-r--r-- | drivers/usb/otg/fsl_otg.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/otg/fsl_otg.c b/drivers/usb/otg/fsl_otg.c index 88d7d4b39f20..2395a639055c 100644 --- a/drivers/usb/otg/fsl_otg.c +++ b/drivers/usb/otg/fsl_otg.c @@ -792,6 +792,8 @@ irqreturn_t fsl_otg_isr_gpio(int irq, void *dev_id) * intact. It needs to have knowledge of some USB interrupts * such as port change. */ +extern int usb_event_is_otg_wakeup(void); +extern void usb_debounce_id_pin(void); irqreturn_t fsl_otg_isr(int irq, void *dev_id) { struct fsl_otg *fotg = (struct fsl_otg *)dev_id; @@ -800,6 +802,11 @@ irqreturn_t fsl_otg_isr(int irq, void *dev_id) irqreturn_t ret = IRQ_NONE; fsl_otg_clk_ctl(); + /* if this is an wakeup event, we should debounce ID pin + * so we can get the correct ID value(ID status) here */ + if (usb_event_is_otg_wakeup()) + usb_debounce_id_pin(); + otg_sc = le32_to_cpu(usb_dr_regs->otgsc); otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8); |