From 9b7f53616366c1e31e948723cba7520213ef307c Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Fri, 3 Jan 2014 13:42:56 +0800 Subject: [PATCH] ENGR00292408-1 usb: chipidea: add query_available_role interface The glue layer may need to know current available role, add ci_hdrc_query_available_role for that. Signed-off-by: Peter Chen --- drivers/usb/chipidea/core.c | 27 +++++++++++++++++++++++++++ include/linux/usb/chipidea.h | 2 ++ 2 files changed, 29 insertions(+) diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 619d13e29995..815b4d24607e 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -539,6 +539,33 @@ void ci_hdrc_remove_device(struct platform_device *pdev) } EXPORT_SYMBOL_GPL(ci_hdrc_remove_device); +/** + * ci_hdrc_query_available_role: get runtime available operation mode + * + * The glue layer can get current operation mode (host/peripheral/otg) + * This function should be called after ci core device has created. + * + * @pdev: the platform device of ci core. + * + * Return USB_DR_MODE_XXX. + */ +enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev) +{ + struct ci_hdrc *ci = platform_get_drvdata(pdev); + + if (!ci) + return USB_DR_MODE_UNKNOWN; + if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) + return USB_DR_MODE_OTG; + else if (ci->roles[CI_ROLE_HOST]) + return USB_DR_MODE_HOST; + else if (ci->roles[CI_ROLE_GADGET]) + return USB_DR_MODE_PERIPHERAL; + else + return USB_DR_MODE_UNKNOWN; +} +EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role); + static inline void ci_role_destroy(struct ci_hdrc *ci) { ci_hdrc_gadget_destroy(ci); diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h index bbe779f640be..b9af938d65b0 100644 --- a/include/linux/usb/chipidea.h +++ b/include/linux/usb/chipidea.h @@ -43,4 +43,6 @@ struct platform_device *ci_hdrc_add_device(struct device *dev, /* Remove ci hdrc device */ void ci_hdrc_remove_device(struct platform_device *pdev); +/* Get current available role */ +enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev); #endif -- 2.39.2