On 06/21/2013 08:58 PM, Kishon Vijay Abraham I wrote: > Modified dwc3-omap to receive connect and disconnect notification using > extcon framework. Also did the necessary cleanups required after > adapting to extcon framework. > > Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx> > Acked-by: Felipe Balbi <balbi@xxxxxx> > Acked-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> > --- > This patch should be applied after all of the extcon patchset will be applied > because this patch has dependency of extcon patch related to DT. > http://goo.gl/Tu3qW > > Changes from v4: > * checked the return values of extcon_register_interest and print an error > message. Note that I dint do return since there might be cases where > one of USB (device mode) or USB-HOST (host mode) might succeed. > * Added depends on of EXTCON in usb_dwc3. Only some platforms might > be using EXTCON, but inorder to avoid compilation errors, added > depends on > Changes from v3: > * did #include of of_extcon.h after Chanwoo resent the patch separating > extcon-class.c from of_extcon.c > Changes from v2: > * updated the Documentation with dwc3 dt binding information. > * used of_extcon_get_extcon_dev to get extcon device from device tree data. > Changes from v1: > * regulator enable/disable is now done here instead of palmas-usb as some users > of palmas-usb wont need regulator. > > Documentation/devicetree/bindings/usb/omap-usb.txt | 5 + > drivers/usb/dwc3/Kconfig | 1 + > drivers/usb/dwc3/dwc3-omap.c | 125 +++++++++++++++++--- > include/linux/usb/dwc3-omap.h | 30 ----- > 4 files changed, 112 insertions(+), 49 deletions(-) > delete mode 100644 include/linux/usb/dwc3-omap.h > > diff --git a/Documentation/devicetree/bindings/usb/omap-usb.txt b/Documentation/devicetree/bindings/usb/omap-usb.txt > index d4769f3..f1c15f3 100644 > --- a/Documentation/devicetree/bindings/usb/omap-usb.txt > +++ b/Documentation/devicetree/bindings/usb/omap-usb.txt > @@ -53,6 +53,11 @@ OMAP DWC3 GLUE > It should be set to "1" for HW mode and "2" for SW mode. > - ranges: the child address space are mapped 1:1 onto the parent address space > > +Optional Properties: > + - extcon : phandle for the extcon device omap dwc3 uses to detect > + connect/disconnect events. > + - vbus-supply : phandle to the regulator device tree node if needed. > + > Sub-nodes: > The dwc3 core should be added as subnode to omap dwc3 glue. > - dwc3 : > diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig > index 757aa18..08a9fab 100644 > --- a/drivers/usb/dwc3/Kconfig > +++ b/drivers/usb/dwc3/Kconfig > @@ -1,6 +1,7 @@ > config USB_DWC3 > tristate "DesignWare USB3 DRD Core Support" > depends on (USB || USB_GADGET) && GENERIC_HARDIRQS > + depends on EXTCON > select USB_XHCI_PLATFORM if USB_SUPPORT && USB_XHCI_HCD > help > Say Y or M here if your system has a Dual Role SuperSpeed > diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c > index f8f76e6..80b5780 100644 > --- a/drivers/usb/dwc3/dwc3-omap.c > +++ b/drivers/usb/dwc3/dwc3-omap.c > @@ -43,13 +43,15 @@ > #include <linux/spinlock.h> > #include <linux/platform_device.h> > #include <linux/platform_data/dwc3-omap.h> > -#include <linux/usb/dwc3-omap.h> > #include <linux/pm_runtime.h> > #include <linux/dma-mapping.h> > #include <linux/ioport.h> > #include <linux/io.h> > #include <linux/of.h> > #include <linux/of_platform.h> > +#include <linux/extcon.h> > +#include <linux/extcon/of_extcon.h> > +#include <linux/regulator/consumer.h> > > #include <linux/usb/otg.h> > > @@ -124,9 +126,21 @@ struct dwc3_omap { > u32 utmi_otg_status; > > u32 dma_status:1; > + > + struct extcon_specific_cable_nb extcon_vbus_dev; > + struct extcon_specific_cable_nb extcon_id_dev; > + struct notifier_block vbus_nb; > + struct notifier_block id_nb; > + > + struct regulator *vbus_reg; > }; > > -static struct dwc3_omap *_omap; > +enum omap_dwc3_vbus_id_status { > + OMAP_DWC3_ID_FLOAT, > + OMAP_DWC3_ID_GROUND, > + OMAP_DWC3_VBUS_OFF, > + OMAP_DWC3_VBUS_VALID, > +}; > > static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset) > { > @@ -138,18 +152,23 @@ static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value) > writel(value, base + offset); > } > > -int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status) > +static void dwc3_omap_set_mailbox(struct dwc3_omap *omap, > + enum omap_dwc3_vbus_id_status status) > { > - u32 val; > - struct dwc3_omap *omap = _omap; > - > - if (!omap) > - return -EPROBE_DEFER; > + int ret; > + u32 val; > > switch (status) { > case OMAP_DWC3_ID_GROUND: > dev_dbg(omap->dev, "ID GND\n"); > > + if (omap->vbus_reg) { > + ret = regulator_enable(omap->vbus_reg); > + if (ret) { > + dev_dbg(omap->dev, "regulator enable failed\n"); > + return; > + } > + } > val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS); > val &= ~(USBOTGSS_UTMI_OTG_STATUS_IDDIG > | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID > @@ -172,6 +191,9 @@ int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status) > break; > > case OMAP_DWC3_ID_FLOAT: > + if (omap->vbus_reg) > + regulator_disable(omap->vbus_reg); > + > case OMAP_DWC3_VBUS_OFF: > dev_dbg(omap->dev, "VBUS Disconnect\n"); > > @@ -185,12 +207,9 @@ int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status) > break; > > default: > - dev_dbg(omap->dev, "ID float\n"); > + dev_dbg(omap->dev, "invalid state\n"); > } > - > - return 0; > } > -EXPORT_SYMBOL_GPL(dwc3_omap_mailbox); > > static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap) > { > @@ -282,6 +301,32 @@ static void dwc3_omap_disable_irqs(struct dwc3_omap *omap) > > static u64 dwc3_omap_dma_mask = DMA_BIT_MASK(32); > > +static int dwc3_omap_id_notifier(struct notifier_block *nb, > + unsigned long event, void *ptr) > +{ > + struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, id_nb); > + > + if (event) > + dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND); > + else > + dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT); > + > + return NOTIFY_DONE; > +} > + > +static int dwc3_omap_vbus_notifier(struct notifier_block *nb, > + unsigned long event, void *ptr) > +{ > + struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, vbus_nb); > + > + if (event) > + dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID); > + else > + dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF); > + > + return NOTIFY_DONE; > +} > + > static int dwc3_omap_probe(struct platform_device *pdev) > { > struct device_node *node = pdev->dev.of_node; > @@ -289,6 +334,8 @@ static int dwc3_omap_probe(struct platform_device *pdev) > struct dwc3_omap *omap; > struct resource *res; > struct device *dev = &pdev->dev; > + struct extcon_dev *edev; > + struct regulator *vbus_reg = NULL; > > int ret = -ENOMEM; > int irq; > @@ -330,19 +377,22 @@ static int dwc3_omap_probe(struct platform_device *pdev) > return -ENOMEM; > } > > + if (of_property_read_bool(node, "vbus-supply")) { > + vbus_reg = devm_regulator_get(dev, "vbus"); > + if (IS_ERR(vbus_reg)) { > + dev_err(dev, "vbus init failed\n"); > + return PTR_ERR(vbus_reg); > + } > + } > + > spin_lock_init(&omap->lock); > > omap->dev = dev; > omap->irq = irq; > omap->base = base; > + omap->vbus_reg = vbus_reg; > dev->dma_mask = &dwc3_omap_dma_mask; > > - /* > - * REVISIT if we ever have two instances of the wrapper, we will be > - * in big trouble > - */ > - _omap = omap; > - > pm_runtime_enable(dev); > ret = pm_runtime_get_sync(dev); > if (ret < 0) { > @@ -381,14 +431,47 @@ static int dwc3_omap_probe(struct platform_device *pdev) > > dwc3_omap_enable_irqs(omap); > > + if (of_property_read_bool(node, "extcon")) { > + edev = of_extcon_get_extcon_dev(dev, 0); > + if (IS_ERR(edev)) { > + dev_vdbg(dev, "couldn't get extcon device\n"); > + ret = PTR_ERR(edev); > + goto err2; > + } > + > + omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier; > + ret = extcon_register_interest(&omap->extcon_vbus_dev, > + edev->name, "USB", &omap->vbus_nb); > + if (ret < 0) > + dev_vdbg(dev, > + "extcon register interest of *USB* failed\n"); > + omap->id_nb.notifier_call = dwc3_omap_id_notifier; > + ret = extcon_register_interest(&omap->extcon_id_dev, edev->name, > + "USB-HOST", &omap->id_nb); > + if (ret < 0) > + dev_vdbg(dev, > + "extcon register interest of *USB-HOST* failed\n"); > + > + if (extcon_get_cable_state(edev, "USB") == true) > + dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID); > + if (extcon_get_cable_state(edev, "USB-HOST") == true) > + dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND); > + } > + > ret = of_platform_populate(node, NULL, NULL, dev); > if (ret) { > dev_err(&pdev->dev, "failed to create dwc3 core\n"); > - goto err2; > + goto err3; > } > > return 0; > > +err3: > + if (omap->extcon_vbus_dev.edev) > + extcon_unregister_interest(&omap->extcon_vbus_dev); > + if (omap->extcon_id_dev.edev) > + extcon_unregister_interest(&omap->extcon_id_dev); > + > err2: > dwc3_omap_disable_irqs(omap); > > @@ -405,6 +488,10 @@ static int dwc3_omap_remove(struct platform_device *pdev) > { > struct dwc3_omap *omap = platform_get_drvdata(pdev); > > + if (omap->extcon_vbus_dev.edev) > + extcon_unregister_interest(&omap->extcon_vbus_dev); > + if (omap->extcon_id_dev.edev) > + extcon_unregister_interest(&omap->extcon_id_dev); > dwc3_omap_disable_irqs(omap); > pm_runtime_put_sync(&pdev->dev); > pm_runtime_disable(&pdev->dev); > diff --git a/include/linux/usb/dwc3-omap.h b/include/linux/usb/dwc3-omap.h > deleted file mode 100644 > index 5615f4d..0000000 > I have below some fixes for indentation and applied it (extcon-for-palmas branch). - dev_vdbg(dev, - "extcon register interest of *USB* failed\n"); + dev_vdbg(dev, "failed to register notifier for USB\n"); omap->id_nb.notifier_call = dwc3_omap_id_notifier; ret = extcon_register_interest(&omap->extcon_id_dev, edev->name, "USB-HOST", &omap->id_nb); if (ret < 0) dev_vdbg(dev, - "extcon register interest of *USB-HOST* failed\n"); + "failed to register notifier for USB-HOST\n"); if (extcon_get_cable_state(edev, "USB") == true) dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID); You can check it on following git repository. - http://git.kernel.org/cgit/linux/kernel/git/chanwoo/extcon.git/commit/?h=extcon-for-palmas&id=bd84f70d42b867dfce61f961fb1c50d22e3ab4a8 And, I have plan to move your patch from extcon-for-palmas to extcon-next branch after below patch on usb.git is applied on v3.11 usb: dwc3: omap: improve error handling of dwc3_omap_probe - https://git.kernel.org/cgit/linux/kernel/git/balbi/usb.git/commit/?h=next&id=594daba1bcb0510cdc9dccfbab9e6fd5d9cc94e6 - git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git (next branch) Thanks, Chanwoo Choi -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
