On Fri, Aug 09, 2013 at 07:46:00PM +0800, Peter Chen wrote:
> On Fri, Aug 09, 2013 at 04:23:11PM +0300, Alexander Shishkin wrote:
> > Peter Chen <peter.chen@xxxxxxxxxxxxx> writes:
> >
> > > CI_HDRC_REGS_SHARED stands for the controller registers is shared
> > > with other USB drivers, if all USB drivers are at chipidea/, it doesn't
> > > needed to set.
> >
> > We still have the msm driver that uses REGS_SHARED.
> >
>
> Yes, I have considered it. At udc interrupt handler, the REGS_SHARED
> is still used. The msm set both CI_HDRC_REGS_SHARED and CI_HDRC_PULLUP_ON_VBUS.
>
> > > CI_HDRC_PULLUP_ON_VBUS stands for pullup dp when the vbus is on. This
> > > flag doesn't need to set if the vbus is always on for gadget
> > > since dp has always pulled up after the gadget has initialized.
> >
> > Didn't we agree at some point to get rid of this flag altogether once we
> > have proper VBUS detection?
>
> Yes, we can delete it now, the reason why I haven't remove it is:
> I met some use cases that the vbus is always on recently,
> no connection/disconnection. Eg, the USB audio device connects
> to Apple Sound machine, the vbus is the power of the device system.
>
> I checked the code just now again, we can cover such kind of case.
I will have a patch to delete CI_HDRC_PULLUP_ON_VBUS. If we squash
two patches, the change like below:
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index bd1fe25..ab3e74a 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -91,7 +91,6 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
.name = "ci_hdrc_imx",
.capoffset = DEF_CAPOFFSET,
.flags = CI_HDRC_REQUIRE_TRANSCEIVER |
- CI_HDRC_PULLUP_ON_VBUS |
CI_HDRC_DISABLE_STREAMING,
};
int ret;
diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index fb657ef..2d51d85 100644
--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -49,7 +49,6 @@ static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
.name = "ci_hdrc_msm",
.flags = CI_HDRC_REGS_SHARED |
CI_HDRC_REQUIRE_TRANSCEIVER |
- CI_HDRC_PULLUP_ON_VBUS |
CI_HDRC_DISABLE_STREAMING,
.notify_event = ci_hdrc_msm_notify_event,
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index c70ce38..f77c904 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1635,14 +1635,11 @@ static int ci_udc_start(struct usb_gadget *gadget,
ci->driver = driver;
pm_runtime_get_sync(&ci->gadget.dev);
- if (ci->platdata->flags & CI_HDRC_PULLUP_ON_VBUS) {
- if (ci->vbus_active) {
- if (ci->platdata->flags & CI_HDRC_REGS_SHARED)
- hw_device_reset(ci, USBMODE_CM_DC);
- } else {
- pm_runtime_put_sync(&ci->gadget.dev);
- goto done;
- }
+ if (ci->vbus_active) {
+ hw_device_reset(ci, USBMODE_CM_DC);
+ } else {
+ pm_runtime_put_sync(&ci->gadget.dev);
+ goto done;
}
retval = hw_device_state(ci, ci->ep0out->qh.dma);
@@ -1665,8 +1662,7 @@ static int ci_udc_stop(struct usb_gadget *gadget,
spin_lock_irqsave(&ci->lock, flags);
- if (!(ci->platdata->flags & CI_HDRC_PULLUP_ON_VBUS) ||
- ci->vbus_active) {
+ if (ci->vbus_active) {
hw_device_state(ci, 0);
if (ci->platdata->notify_event)
ci->platdata->notify_event(ci,
@@ -1801,12 +1797,6 @@ static int udc_start(struct ci_hdrc *ci)
}
}
- if (!(ci->platdata->flags & CI_HDRC_REGS_SHARED)) {
- retval = hw_device_reset(ci, USBMODE_CM_DC);
- if (retval)
- goto put_transceiver;
- }
-
if (ci->transceiver) {
retval = otg_set_peripheral(ci->transceiver->otg,
&ci->gadget);
diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index 10a607c..7c4ba37 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -18,13 +18,12 @@ struct ci_hdrc_platform_data {
unsigned long flags;
#define CI_HDRC_REGS_SHARED BIT(0)
#define CI_HDRC_REQUIRE_TRANSCEIVER BIT(1)
-#define CI_HDRC_PULLUP_ON_VBUS BIT(2)
-#define CI_HDRC_DISABLE_STREAMING BIT(3)
+#define CI_HDRC_DISABLE_STREAMING BIT(2)
/*
* Only set it when DCCPARAMS.DC==1 and DCCPARAMS.HC==1,
* but otg is not supported (no register otgsc).
*/
-#define CI_HDRC_DUAL_ROLE_NOT_OTG BIT(4)
+#define CI_HDRC_DUAL_ROLE_NOT_OTG BIT(3)
enum usb_dr_mode dr_mode;
#define CI_HDRC_CONTROLLER_RESET_EVENT 0
#define CI_HDRC_CONTROLLER_STOPPED_EVENT 1
--
Best Regards,
Peter Chen
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
