From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roger Quadros Subject: [PATCH v4 10/13] usb: hcd: Adapt to OTG core Date: Mon, 24 Aug 2015 16:21:21 +0300 Message-ID: <1440422484-4737-11-git-send-email-rogerq@ti.com> References: <1440422484-4737-1-git-send-email-rogerq@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1440422484-4737-1-git-send-email-rogerq@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: stern@rowland.harvard.edu, balbi@ti.com, gregkh@linuxfoundation.org, peter.chen@freescale.com Cc: dan.j.williams@intel.com, jun.li@freescale.com, mathias.nyman@linux.intel.com, tony@atomide.com, Joao.Pinto@synopsys.com, abrestic@chromium.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Roger Quadros List-Id: linux-omap@vger.kernel.org The existing usb_add/remove_hcd() functionality remains unchanged for non-OTG devices. For OTG devices they only register the HCD with the OTG core. Introduce usb_otg_add/remove_hcd() for use by OTG core. These functions actually add/remove the HCD. Signed-off-by: Roger Quadros --- drivers/usb/core/hcd.c | 55 +++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 50 insertions(+), 5 deletions(-) diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index c0fd1f6..4851682 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -46,6 +46,7 @@ #include #include #include +#include #include "usb.h" @@ -2625,8 +2626,8 @@ static void usb_put_invalidate_rhdev(struct usb_hcd *hcd) * buffers of consistent memory, register the bus, request the IRQ line, * and call the driver's reset() and start() routines. */ -int usb_add_hcd(struct usb_hcd *hcd, - unsigned int irqnum, unsigned long irqflags) +static int usb_otg_add_hcd(struct usb_hcd *hcd, + unsigned int irqnum, unsigned long irqflags) { int retval; struct usb_device *rhdev; @@ -2839,17 +2840,16 @@ err_phy: } return retval; } -EXPORT_SYMBOL_GPL(usb_add_hcd); /** - * usb_remove_hcd - shutdown processing for generic HCDs + * usb_otg_remove_hcd - shutdown processing for generic HCDs * @hcd: the usb_hcd structure to remove * Context: !in_interrupt() * * Disconnects the root hub, then reverses the effects of usb_add_hcd(), * invoking the HCD's stop() method. */ -void usb_remove_hcd(struct usb_hcd *hcd) +static void usb_otg_remove_hcd(struct usb_hcd *hcd) { struct usb_device *rhdev = hcd->self.root_hub; @@ -2923,6 +2923,51 @@ void usb_remove_hcd(struct usb_hcd *hcd) usb_put_invalidate_rhdev(hcd); } + +static struct otg_hcd_ops otg_hcd_intf = { + .add = usb_otg_add_hcd, + .remove = usb_otg_remove_hcd, +}; + +/** + * usb_add_hcd - finish generic HCD structure initialization and register + * @hcd: the usb_hcd structure to initialize + * @irqnum: Interrupt line to allocate + * @irqflags: Interrupt type flags + * + * Finish the remaining parts of generic HCD initialization: allocate the + * buffers of consistent memory, register the bus, request the IRQ line, + * and call the driver's reset() and start() routines. + * If it is an OTG device then it only registers the HCD with OTG core. + * + */ +int usb_add_hcd(struct usb_hcd *hcd, + unsigned int irqnum, unsigned long irqflags) +{ + /* If OTG device, OTG core takes care of adding HCD */ + if (usb_otg_register_hcd(hcd, irqnum, irqflags, &otg_hcd_intf)) + return usb_otg_add_hcd(hcd, irqnum, irqflags); + + return 0; +} +EXPORT_SYMBOL_GPL(usb_add_hcd); + +/** + * usb_remove_hcd - shutdown processing for generic HCDs + * @hcd: the usb_hcd structure to remove + * Context: !in_interrupt() + * + * Disconnects the root hub, then reverses the effects of usb_add_hcd(), + * invoking the HCD's stop() method. + * If it is an OTG device then it unregisters the HCD from OTG core + * as well. + */ +void usb_remove_hcd(struct usb_hcd *hcd) +{ + /* If OTG device, OTG core takes care of stopping HCD */ + if (usb_otg_unregister_hcd(hcd)) + usb_otg_remove_hcd(hcd); +} EXPORT_SYMBOL_GPL(usb_remove_hcd); void -- 2.1.4