| Message ID | 20190719081316.9298-1-m.szyprowski@samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Fix USB3.0 DRD PHY calibration issues (DWC3/XHCI) on Exynos542x SoCs | expand |
Hi Marek, On Fri, 19 Jul 2019 at 13:43, Marek Szyprowski <m.szyprowski@samsung.com> wrote: > > Some PHYs (for example Exynos5 USB3.0 DRD PHY) require calibration to be > done after every USB HCD reset. Generic PHY framework has been already > extended with phy_calibrate() function in commit 36914111e682 ("drivers: > phy: add calibrate method"). This patch adds support for it to generic > PHY handling code in USB HCD core. > Tested on my XU3 / XU4 / HC1 Tested-by: Anand Moon <linux.amoon@gmail.com> > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > drivers/usb/core/hcd.c | 7 +++++++ > drivers/usb/core/phy.c | 21 +++++++++++++++++++++ > drivers/usb/core/phy.h | 1 + > 3 files changed, 29 insertions(+) > > diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c > index 88533938ce19..b89936c1df23 100644 > --- a/drivers/usb/core/hcd.c > +++ b/drivers/usb/core/hcd.c > @@ -2291,6 +2291,9 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) > hcd->state = HC_STATE_RESUMING; > status = hcd->driver->bus_resume(hcd); > clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); > + if (status == 0) > + status = usb_phy_roothub_calibrate(hcd->phy_roothub); > + > if (status == 0) { > struct usb_device *udev; > int port1; > @@ -2864,6 +2867,10 @@ int usb_add_hcd(struct usb_hcd *hcd, > } > hcd->rh_pollable = 1; > > + retval = usb_phy_roothub_calibrate(hcd->phy_roothub); > + if (retval) > + goto err_hcd_driver_setup; > + > /* NOTE: root hub and controller capabilities may not be the same */ > if (device_can_wakeup(hcd->self.controller) > && device_can_wakeup(&hcd->self.root_hub->dev)) > diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c > index 7580493b867a..fb1588e7c282 100644 > --- a/drivers/usb/core/phy.c > +++ b/drivers/usb/core/phy.c > @@ -151,6 +151,27 @@ int usb_phy_roothub_set_mode(struct usb_phy_roothub *phy_roothub, > } > EXPORT_SYMBOL_GPL(usb_phy_roothub_set_mode); > > +int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub) > +{ > + struct usb_phy_roothub *roothub_entry; > + struct list_head *head; > + int err; > + > + if (!phy_roothub) > + return 0; > + > + head = &phy_roothub->list; > + > + list_for_each_entry(roothub_entry, head, list) { > + err = phy_calibrate(roothub_entry->phy); > + if (err) > + return err; > + } > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(usb_phy_roothub_calibrate); > + > int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub) > { > struct usb_phy_roothub *roothub_entry; > diff --git a/drivers/usb/core/phy.h b/drivers/usb/core/phy.h > index dad564e2d2d4..20a267cd986b 100644 > --- a/drivers/usb/core/phy.h > +++ b/drivers/usb/core/phy.h > @@ -18,6 +18,7 @@ int usb_phy_roothub_exit(struct usb_phy_roothub *phy_roothub); > > int usb_phy_roothub_set_mode(struct usb_phy_roothub *phy_roothub, > enum phy_mode mode); > +int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub); > int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub); > void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub); > > -- > 2.17.1 >
Hi Marek, thanks for working on this! Tested on my XU4 Tested-by: Jochen Sprickerhof <jochen@sprickerhof.de> * Anand Moon <linux.amoon@gmail.com> [2019-07-23 00:30]: >Hi Marek, > >On Fri, 19 Jul 2019 at 13:43, Marek Szyprowski <m.szyprowski@samsung.com> wrote: >> >> Some PHYs (for example Exynos5 USB3.0 DRD PHY) require calibration to be >> done after every USB HCD reset. Generic PHY framework has been already >> extended with phy_calibrate() function in commit 36914111e682 ("drivers: >> phy: add calibrate method"). This patch adds support for it to generic >> PHY handling code in USB HCD core. >> > >Tested on my XU3 / XU4 / HC1 >Tested-by: Anand Moon <linux.amoon@gmail.com> > > >> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> >> --- >> drivers/usb/core/hcd.c | 7 +++++++ >> drivers/usb/core/phy.c | 21 +++++++++++++++++++++ >> drivers/usb/core/phy.h | 1 + >> 3 files changed, 29 insertions(+) >> >> diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c >> index 88533938ce19..b89936c1df23 100644 >> --- a/drivers/usb/core/hcd.c >> +++ b/drivers/usb/core/hcd.c >> @@ -2291,6 +2291,9 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) >> hcd->state = HC_STATE_RESUMING; >> status = hcd->driver->bus_resume(hcd); >> clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); >> + if (status == 0) >> + status = usb_phy_roothub_calibrate(hcd->phy_roothub); >> + >> if (status == 0) { >> struct usb_device *udev; >> int port1; >> @@ -2864,6 +2867,10 @@ int usb_add_hcd(struct usb_hcd *hcd, >> } >> hcd->rh_pollable = 1; >> >> + retval = usb_phy_roothub_calibrate(hcd->phy_roothub); >> + if (retval) >> + goto err_hcd_driver_setup; >> + >> /* NOTE: root hub and controller capabilities may not be the same */ >> if (device_can_wakeup(hcd->self.controller) >> && device_can_wakeup(&hcd->self.root_hub->dev)) >> diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c >> index 7580493b867a..fb1588e7c282 100644 >> --- a/drivers/usb/core/phy.c >> +++ b/drivers/usb/core/phy.c >> @@ -151,6 +151,27 @@ int usb_phy_roothub_set_mode(struct usb_phy_roothub *phy_roothub, >> } >> EXPORT_SYMBOL_GPL(usb_phy_roothub_set_mode); >> >> +int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub) >> +{ >> + struct usb_phy_roothub *roothub_entry; >> + struct list_head *head; >> + int err; >> + >> + if (!phy_roothub) >> + return 0; >> + >> + head = &phy_roothub->list; >> + >> + list_for_each_entry(roothub_entry, head, list) { >> + err = phy_calibrate(roothub_entry->phy); >> + if (err) >> + return err; >> + } >> + >> + return 0; >> +} >> +EXPORT_SYMBOL_GPL(usb_phy_roothub_calibrate); >> + >> int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub) >> { >> struct usb_phy_roothub *roothub_entry; >> diff --git a/drivers/usb/core/phy.h b/drivers/usb/core/phy.h >> index dad564e2d2d4..20a267cd986b 100644 >> --- a/drivers/usb/core/phy.h >> +++ b/drivers/usb/core/phy.h >> @@ -18,6 +18,7 @@ int usb_phy_roothub_exit(struct usb_phy_roothub *phy_roothub); >> >> int usb_phy_roothub_set_mode(struct usb_phy_roothub *phy_roothub, >> enum phy_mode mode); >> +int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub); >> int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub); >> void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub); >> >> -- >> 2.17.1 >> >
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 88533938ce19..b89936c1df23 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2291,6 +2291,9 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) hcd->state = HC_STATE_RESUMING; status = hcd->driver->bus_resume(hcd); clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); + if (status == 0) + status = usb_phy_roothub_calibrate(hcd->phy_roothub); + if (status == 0) { struct usb_device *udev; int port1; @@ -2864,6 +2867,10 @@ int usb_add_hcd(struct usb_hcd *hcd, } hcd->rh_pollable = 1; + retval = usb_phy_roothub_calibrate(hcd->phy_roothub); + if (retval) + goto err_hcd_driver_setup; + /* NOTE: root hub and controller capabilities may not be the same */ if (device_can_wakeup(hcd->self.controller) && device_can_wakeup(&hcd->self.root_hub->dev)) diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c index 7580493b867a..fb1588e7c282 100644 --- a/drivers/usb/core/phy.c +++ b/drivers/usb/core/phy.c @@ -151,6 +151,27 @@ int usb_phy_roothub_set_mode(struct usb_phy_roothub *phy_roothub, } EXPORT_SYMBOL_GPL(usb_phy_roothub_set_mode); +int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub) +{ + struct usb_phy_roothub *roothub_entry; + struct list_head *head; + int err; + + if (!phy_roothub) + return 0; + + head = &phy_roothub->list; + + list_for_each_entry(roothub_entry, head, list) { + err = phy_calibrate(roothub_entry->phy); + if (err) + return err; + } + + return 0; +} +EXPORT_SYMBOL_GPL(usb_phy_roothub_calibrate); + int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub) { struct usb_phy_roothub *roothub_entry; diff --git a/drivers/usb/core/phy.h b/drivers/usb/core/phy.h index dad564e2d2d4..20a267cd986b 100644 --- a/drivers/usb/core/phy.h +++ b/drivers/usb/core/phy.h @@ -18,6 +18,7 @@ int usb_phy_roothub_exit(struct usb_phy_roothub *phy_roothub); int usb_phy_roothub_set_mode(struct usb_phy_roothub *phy_roothub, enum phy_mode mode); +int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub); int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub); void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub);
Some PHYs (for example Exynos5 USB3.0 DRD PHY) require calibration to be done after every USB HCD reset. Generic PHY framework has been already extended with phy_calibrate() function in commit 36914111e682 ("drivers: phy: add calibrate method"). This patch adds support for it to generic PHY handling code in USB HCD core. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/usb/core/hcd.c | 7 +++++++ drivers/usb/core/phy.c | 21 +++++++++++++++++++++ drivers/usb/core/phy.h | 1 + 3 files changed, 29 insertions(+)