> >>>> > >>>> - Registering an OTG capable controller > >>>> - Registering Host and Gadget controllers to OTG core > >>>> - Providing inputs to and kicking the OTG state machine > >>>> > >>>> TODO: > >>>> - sysfs interface to allow application inputs to OTG state machine > >>>> - otg class? > >>>> > >>>> Signed-off-by: Roger Quadros <rogerq@xxxxxx> > >>>> --- > >>>> drivers/usb/Makefile | 1 + > >>>> drivers/usb/common/Makefile | 1 + > >>>> drivers/usb/common/usb-otg.c | 732 > >>>> +++++++++++++++++++++++++++++++++++++++++++ > >>>> drivers/usb/common/usb-otg.h | 71 +++++ > >>>> drivers/usb/core/Kconfig | 8 + > >>>> include/linux/usb/usb-otg.h | 86 +++++ > >>>> 6 files changed, 899 insertions(+) create mode 100644 > >>>> drivers/usb/common/usb-otg.c create mode 100644 > >>>> drivers/usb/common/usb-otg.h create mode 100644 > >>>> include/linux/usb/usb-otg.h > >>>> > >>>> diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile index > >>>> 2f1e2aa..07f59a5 100644 > >>>> --- a/drivers/usb/Makefile > >>>> +++ b/drivers/usb/Makefile > >>>> @@ -60,5 +60,6 @@ obj-$(CONFIG_USB_RENESAS_USBHS) += > renesas_usbhs/ > >>>> obj-$(CONFIG_USB_GADGET) += gadget/ > >>>> > >>>> obj-$(CONFIG_USB_COMMON) += common/ > >>>> +obj-$(CONFIG_USB_OTG_CORE) += common/ > >>>> > >>>> obj-$(CONFIG_USBIP_CORE) += usbip/ > >>>> diff --git a/drivers/usb/common/Makefile > >>>> b/drivers/usb/common/Makefile index ca2f8bd..573fc75 100644 > >>>> --- a/drivers/usb/common/Makefile > >>>> +++ b/drivers/usb/common/Makefile > >>>> @@ -7,3 +7,4 @@ usb-common-y += common.o > >>>> usb-common-$(CONFIG_USB_LED_TRIG) += led.o > >>>> > >>>> obj-$(CONFIG_USB_OTG_FSM) += usb-otg-fsm.o > >>>> +obj-$(CONFIG_USB_OTG_CORE) += usb-otg.o > >>>> diff --git a/drivers/usb/common/usb-otg.c > >>>> b/drivers/usb/common/usb-otg.c new file mode 100644 index > >>>> 0000000..1433fc9 > >>>> --- /dev/null > >>>> +++ b/drivers/usb/common/usb-otg.c > >>>> @@ -0,0 +1,732 @@ > >>>> +/** > >>>> + * drivers/usb/common/usb-otg.c - USB OTG core > >>>> + * > >>>> + * Copyright (C) 2015 Texas Instruments Incorporated - > >>>> +http://www.ti.com > >>>> + * Author: Roger Quadros <rogerq@xxxxxx> > >>>> + * > >>>> + * This program is free software; you can redistribute it and/or > >>>> +modify > >>>> + * it under the terms of the GNU General Public License version 2 > >>>> +as > >>>> + * published by the Free Software Foundation. > >>>> + * > >>>> + * This program is distributed in the hope that it will be useful, > >>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of > >>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > >>>> + * GNU General Public License for more details. > >>>> + */ > >>>> + > >>>> +#include <linux/kernel.h> > >>>> +#include <linux/list.h> > >>>> +#include <linux/timer.h> > >>>> +#include <linux/usb/otg.h> > >>>> +#include <linux/usb/phy.h> /* enum usb_otg_state */ > >>>> +#include <linux/usb/gadget.h> > >>>> +#include <linux/usb/usb-otg.h> > >>>> +#include <linux/workqueue.h> > >>>> + > >>>> +#include "usb-otg.h" > >>>> + > >>>> +/* to link timer with callback data */ struct otg_timer { > >>>> + struct timer_list timer; > >>>> + /* callback data */ > >>>> + int *timeout_bit; > >>>> + struct otg_data *otgd; > >>>> +}; > >>>> + > >>>> +struct otg_data { > >>>> + struct device *dev; /* HCD & GCD's parent device */ > >>>> + > >>>> + struct otg_fsm fsm; > >>>> + /* HCD, GCD and usb_otg_state are present in otg_fsm->otg > >>>> + * HCD is bus_to_hcd(fsm->otg->host) > >>>> + * GCD is fsm->otg->gadget > >>>> + */ > >>>> + struct otg_fsm_ops fsm_ops; /* private copy for override */ > >>>> + struct usb_otg otg; > >>>> + struct usb_hcd *shared_hcd; /* if shared HCD registered */ > >>>> + > >>>> + /* saved hooks to OTG device */ > >>>> + int (*start_host)(struct otg_fsm *fsm, int on); > >>>> + int (*start_gadget)(struct otg_fsm *fsm, int on); > >>>> + > >>>> + struct list_head list; > >>>> + > >>>> + struct work_struct work; /* OTG FSM work */ > >>>> + struct workqueue_struct *wq; > >>>> + > >>>> + struct otg_timer timers[NUM_OTG_FSM_TIMERS]; > >>>> + > >>>> + bool fsm_running; > >>>> + bool gadget_can_start; /* OTG FSM says gadget can start */ > >>>> + bool host_can_start; /* OTG FSM says host can start */ > >>>> + > >>>> + /* use otg->fsm.lock for serializing access */ }; > >>> > >>> What's the relationship between struct usb_otg otg and this one? > >> > >> Did you mean why struct usb_otg otg is there in struct otg_data? > >> Just for easy allocation. fsm_ops only contains the pointer to struct usb_otg. > >> > > > > The reason why I ask this question is the most structures at usb_otg > > (only enum usb_otg_state)are useless for otg_fsm, this structure may > > only for hardware otg fsm driver, so your OTG framework should only > > for software FSM drivers, right? > > right. we only need it for enum usb_otg_state. > Do you see how we can improve it? > Felipe & Roger, if we need to go on supporting legacies otg driver, we need to keep struct usb_otg unchanged, and teach new otg driver using Roger's framework. Peter -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
