| Message ID | 1649321104-31322-2-git-send-email-quic_c_sanm@quicinc.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | USB DWC3 host wake up support from system suspend | expand |
On Thu, Apr 07, 2022 at 02:14:59PM +0530, Sandeep Maheswaram wrote: > During suspend read the status of all port and set hs phy mode > based on current speed. Use this hs phy mode to configure wakeup > interrupts in qcom glue driver. > > Also check during suspend if any wakeup capable devices are > connected to the controller (directly or through hubs), if there > are none set a flag to indicate that the PHY is powered > down during suspend. > > Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > --- > drivers/usb/dwc3/core.c | 29 ++++++++++++++++++++--------- > drivers/usb/dwc3/core.h | 4 ++++ > drivers/usb/dwc3/host.c | 25 +++++++++++++++++++++++++ > 3 files changed, 49 insertions(+), 9 deletions(-) > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c > index 1170b80..b102a22 100644 > --- a/drivers/usb/dwc3/core.c > +++ b/drivers/usb/dwc3/core.c > @@ -32,6 +32,7 @@ > #include <linux/usb/gadget.h> > #include <linux/usb/of.h> > #include <linux/usb/otg.h> > +#include <linux/usb/hcd.h> > > #include "core.h" > #include "gadget.h" > @@ -1723,6 +1724,7 @@ static int dwc3_probe(struct platform_device *pdev) > > platform_set_drvdata(pdev, dwc); > dwc3_cache_hwparams(dwc); > + device_init_wakeup(&pdev->dev, of_property_read_bool(dev->of_node, "wakeup-source")); > > spin_lock_init(&dwc->lock); > mutex_init(&dwc->mutex); > @@ -1865,6 +1867,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) > { > unsigned long flags; > u32 reg; > + struct usb_hcd *hcd = platform_get_drvdata(dwc->xhci); > > switch (dwc->current_dr_role) { > case DWC3_GCTL_PRTCAP_DEVICE: > @@ -1877,10 +1880,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) > dwc3_core_exit(dwc); > break; > case DWC3_GCTL_PRTCAP_HOST: > - if (!PMSG_IS_AUTO(msg)) { > - dwc3_core_exit(dwc); > - break; > - } > + dwc3_set_phy_speed_mode(dwc); > > /* Let controller to suspend HSPHY before PHY driver suspends */ > if (dwc->dis_u2_susphy_quirk || > @@ -1896,6 +1896,16 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) > > phy_pm_runtime_put_sync(dwc->usb2_generic_phy); > phy_pm_runtime_put_sync(dwc->usb3_generic_phy); > + > + if (!PMSG_IS_AUTO(msg)) { > + if (device_may_wakeup(dwc->dev) && > + usb_wakeup_enabled_descendants(hcd->self.root_hub)) { Did you ever try whether you could use device_children_wakeup_capable() from [1] instead of usb_wakeup_enabled_descendants()? [1] https://patchwork.kernel.org/project/linux-usb/patch/1635753224-23975-2-git-send-email-quic_c_sanm@quicinc.com/#24566065 > + dwc->phy_power_off = false; > + } else { > + dwc->phy_power_off = true; > + dwc3_core_exit(dwc); > + } > + } > break; > case DWC3_GCTL_PRTCAP_OTG: > /* do nothing during runtime_suspend */ > @@ -1939,11 +1949,12 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) > break; > case DWC3_GCTL_PRTCAP_HOST: > if (!PMSG_IS_AUTO(msg)) { > - ret = dwc3_core_init_for_resume(dwc); > - if (ret) > - return ret; > - dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); > - break; > + if (dwc->phy_power_off) { > + ret = dwc3_core_init_for_resume(dwc); > + if (ret) > + return ret; > + dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); > + } > } > /* Restore GUSB2PHYCFG bits that were modified in suspend */ > reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); > diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h > index 5c9d467..de58995 100644 > --- a/drivers/usb/dwc3/core.h > +++ b/drivers/usb/dwc3/core.h > @@ -1154,6 +1154,9 @@ struct dwc3 { > > bool phys_ready; > > + unsigned int hs_phy_mode; > + bool phy_power_off; > + > struct ulpi *ulpi; > bool ulpi_ready; > > @@ -1537,6 +1540,7 @@ int dwc3_core_soft_reset(struct dwc3 *dwc); > #if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) > int dwc3_host_init(struct dwc3 *dwc); > void dwc3_host_exit(struct dwc3 *dwc); > +void dwc3_set_phy_speed_mode(struct dwc3 *dwc); > #else > static inline int dwc3_host_init(struct dwc3 *dwc) > { return 0; } > diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c > index eda8719..74e7d92 100644 > --- a/drivers/usb/dwc3/host.c > +++ b/drivers/usb/dwc3/host.c > @@ -13,6 +13,7 @@ > #include <linux/platform_device.h> > > #include "core.h" > +#include "../host/xhci.h" > > static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc, > int irq, char *name) > @@ -138,3 +139,27 @@ void dwc3_host_exit(struct dwc3 *dwc) > { > platform_device_unregister(dwc->xhci); > } > + > +void dwc3_set_phy_speed_mode(struct dwc3 *dwc) IMO the name is a bit confusing, it suggests that the speed at which the PHY operates is changed, which isn't the case. I suggest to change the name to dwc3_determine_phy_speed_mode() (or something similar). > +{ > + > + int i, num_ports; > + u32 reg; > + struct usb_hcd *hcd = platform_get_drvdata(dwc->xhci); > + struct xhci_hcd *xhci_hcd = hcd_to_xhci(hcd); > + > + dwc->hs_phy_mode = 0; > + > + reg = readl(&xhci_hcd->cap_regs->hcs_params1); > + > + num_ports = HCS_MAX_PORTS(reg); > + for (i = 0; i < num_ports; i++) { > + reg = readl(&xhci_hcd->op_regs->port_status_base + i * NUM_PORT_REGS); > + if (reg & PORT_PE) { > + if (DEV_HIGHSPEED(reg) || DEV_FULLSPEED(reg)) > + dwc->hs_phy_mode |= PHY_MODE_USB_HOST_HS; > + else if (DEV_LOWSPEED(reg)) > + dwc->hs_phy_mode |= PHY_MODE_USB_HOST_LS; > + } > + } > +} > -- > 2.7.4 >
On Thu, Apr 07, 2022 at 02:14:59PM +0530, Sandeep Maheswaram wrote: > During suspend read the status of all port and set hs phy mode > based on current speed. Use this hs phy mode to configure wakeup > interrupts in qcom glue driver. > > Also check during suspend if any wakeup capable devices are > connected to the controller (directly or through hubs), if there > are none set a flag to indicate that the PHY is powered > down during suspend. > > Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > --- > drivers/usb/dwc3/core.c | 29 ++++++++++++++++++++--------- > drivers/usb/dwc3/core.h | 4 ++++ > drivers/usb/dwc3/host.c | 25 +++++++++++++++++++++++++ > 3 files changed, 49 insertions(+), 9 deletions(-) > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c > index 1170b80..b102a22 100644 > --- a/drivers/usb/dwc3/core.c > +++ b/drivers/usb/dwc3/core.c > @@ -32,6 +32,7 @@ > #include <linux/usb/gadget.h> > #include <linux/usb/of.h> > #include <linux/usb/otg.h> > +#include <linux/usb/hcd.h> > > #include "core.h" > #include "gadget.h" > @@ -1723,6 +1724,7 @@ static int dwc3_probe(struct platform_device *pdev) > > platform_set_drvdata(pdev, dwc); > dwc3_cache_hwparams(dwc); > + device_init_wakeup(&pdev->dev, of_property_read_bool(dev->of_node, "wakeup-source")); The current code calls device_init_wakeup(true) in runtime suspend and calls device_init_wakeup(false) in runtime resume. We don't want that right now given that we have a this new dT property. can you fix this please? Thanks, Pavan
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 1170b80..b102a22 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -32,6 +32,7 @@ #include <linux/usb/gadget.h> #include <linux/usb/of.h> #include <linux/usb/otg.h> +#include <linux/usb/hcd.h> #include "core.h" #include "gadget.h" @@ -1723,6 +1724,7 @@ static int dwc3_probe(struct platform_device *pdev) platform_set_drvdata(pdev, dwc); dwc3_cache_hwparams(dwc); + device_init_wakeup(&pdev->dev, of_property_read_bool(dev->of_node, "wakeup-source")); spin_lock_init(&dwc->lock); mutex_init(&dwc->mutex); @@ -1865,6 +1867,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) { unsigned long flags; u32 reg; + struct usb_hcd *hcd = platform_get_drvdata(dwc->xhci); switch (dwc->current_dr_role) { case DWC3_GCTL_PRTCAP_DEVICE: @@ -1877,10 +1880,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) dwc3_core_exit(dwc); break; case DWC3_GCTL_PRTCAP_HOST: - if (!PMSG_IS_AUTO(msg)) { - dwc3_core_exit(dwc); - break; - } + dwc3_set_phy_speed_mode(dwc); /* Let controller to suspend HSPHY before PHY driver suspends */ if (dwc->dis_u2_susphy_quirk || @@ -1896,6 +1896,16 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) phy_pm_runtime_put_sync(dwc->usb2_generic_phy); phy_pm_runtime_put_sync(dwc->usb3_generic_phy); + + if (!PMSG_IS_AUTO(msg)) { + if (device_may_wakeup(dwc->dev) && + usb_wakeup_enabled_descendants(hcd->self.root_hub)) { + dwc->phy_power_off = false; + } else { + dwc->phy_power_off = true; + dwc3_core_exit(dwc); + } + } break; case DWC3_GCTL_PRTCAP_OTG: /* do nothing during runtime_suspend */ @@ -1939,11 +1949,12 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) break; case DWC3_GCTL_PRTCAP_HOST: if (!PMSG_IS_AUTO(msg)) { - ret = dwc3_core_init_for_resume(dwc); - if (ret) - return ret; - dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); - break; + if (dwc->phy_power_off) { + ret = dwc3_core_init_for_resume(dwc); + if (ret) + return ret; + dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); + } } /* Restore GUSB2PHYCFG bits that were modified in suspend */ reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 5c9d467..de58995 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1154,6 +1154,9 @@ struct dwc3 { bool phys_ready; + unsigned int hs_phy_mode; + bool phy_power_off; + struct ulpi *ulpi; bool ulpi_ready; @@ -1537,6 +1540,7 @@ int dwc3_core_soft_reset(struct dwc3 *dwc); #if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) int dwc3_host_init(struct dwc3 *dwc); void dwc3_host_exit(struct dwc3 *dwc); +void dwc3_set_phy_speed_mode(struct dwc3 *dwc); #else static inline int dwc3_host_init(struct dwc3 *dwc) { return 0; } diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index eda8719..74e7d92 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -13,6 +13,7 @@ #include <linux/platform_device.h> #include "core.h" +#include "../host/xhci.h" static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc, int irq, char *name) @@ -138,3 +139,27 @@ void dwc3_host_exit(struct dwc3 *dwc) { platform_device_unregister(dwc->xhci); } + +void dwc3_set_phy_speed_mode(struct dwc3 *dwc) +{ + + int i, num_ports; + u32 reg; + struct usb_hcd *hcd = platform_get_drvdata(dwc->xhci); + struct xhci_hcd *xhci_hcd = hcd_to_xhci(hcd); + + dwc->hs_phy_mode = 0; + + reg = readl(&xhci_hcd->cap_regs->hcs_params1); + + num_ports = HCS_MAX_PORTS(reg); + for (i = 0; i < num_ports; i++) { + reg = readl(&xhci_hcd->op_regs->port_status_base + i * NUM_PORT_REGS); + if (reg & PORT_PE) { + if (DEV_HIGHSPEED(reg) || DEV_FULLSPEED(reg)) + dwc->hs_phy_mode |= PHY_MODE_USB_HOST_HS; + else if (DEV_LOWSPEED(reg)) + dwc->hs_phy_mode |= PHY_MODE_USB_HOST_LS; + } + } +}
During suspend read the status of all port and set hs phy mode based on current speed. Use this hs phy mode to configure wakeup interrupts in qcom glue driver. Also check during suspend if any wakeup capable devices are connected to the controller (directly or through hubs), if there are none set a flag to indicate that the PHY is powered down during suspend. Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com> --- drivers/usb/dwc3/core.c | 29 ++++++++++++++++++++--------- drivers/usb/dwc3/core.h | 4 ++++ drivers/usb/dwc3/host.c | 25 +++++++++++++++++++++++++ 3 files changed, 49 insertions(+), 9 deletions(-)