%s/initlization/initialization
Reply-To:
In-Reply-To: <1390182980-8349-3-git-send-email-b47...@freescale.com>
On Mon, Jan 20, 2014 at 09:56:13AM +0800, Li Jun wrote:
> This patch adds OTG fsm related initizations when do otg init,
> add a seperate file for OTG fsm related utilities.
%s/initlization/initialization
>
> Signed-off-by: Li Jun <b47...@freescale.com>
> ---
> drivers/usb/chipidea/Makefile | 1 +
> drivers/usb/chipidea/ci.h | 1 +
> drivers/usb/chipidea/otg.c | 7 ++++
> drivers/usb/chipidea/otg_fsm.c | 69
> ++++++++++++++++++++++++++++++++++++++++
> drivers/usb/chipidea/otg_fsm.h | 29 +++++++++++++++++
> 5 files changed, 107 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
> index 7345d21..5e1ecc5 100644
> --- a/drivers/usb/chipidea/Makefile
> +++ b/drivers/usb/chipidea/Makefile
> @@ -6,6 +6,7 @@ ci_hdrc-y := core.o otg.o
> ci_hdrc-$(CONFIG_USB_CHIPIDEA_UDC) += udc.o
> ci_hdrc-$(CONFIG_USB_CHIPIDEA_HOST) += host.o
> ci_hdrc-$(CONFIG_USB_CHIPIDEA_DEBUG) += debug.o
> +ci_hdrc-$(CONFIG_USB_OTG_FSM) += otg_fsm.o
Let's wait Felipe's response, if we can only use CONFIG_USB_OTG.
>
> # Glue/Bridge layers go here
>
> diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
> index 88b80f7..54409d0 100644
> --- a/drivers/usb/chipidea/ci.h
> +++ b/drivers/usb/chipidea/ci.h
> @@ -174,6 +174,7 @@ struct ci_hdrc {
> struct ci_role_driver *roles[CI_ROLE_END];
> enum ci_role role;
> bool is_otg;
> + struct otg_fsm *fsm;
> struct work_struct work;
> struct workqueue_struct *wq;
>
> diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
> index 39bd7ec..cbf0167 100644
> --- a/drivers/usb/chipidea/otg.c
> +++ b/drivers/usb/chipidea/otg.c
> @@ -22,6 +22,7 @@
> #include "ci.h"
> #include "bits.h"
> #include "otg.h"
> +#include "otg_fsm.h"
>
> /**
> * ci_otg_role - pick role based on ID pin state
> @@ -95,6 +96,12 @@ static void ci_otg_work(struct work_struct *work)
> */
> int ci_hdrc_otg_init(struct ci_hdrc *ci)
> {
> + int retval = 0;
> +
> + retval = ci_hdrc_otg_fsm_init(ci);
> + if (retval)
> + return retval;
> +
> INIT_WORK(&ci->work, ci_otg_work);
> ci->wq = create_singlethread_workqueue("ci_otg");
> if (!ci->wq) {
> diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
> new file mode 100644
> index 0000000..567510a
> --- /dev/null
> +++ b/drivers/usb/chipidea/otg_fsm.c
> @@ -0,0 +1,69 @@
> +/*
> + * otg_fsm.c - ChipIdea USB IP core OTG FSM driver
> + *
> + * Copyright (C) 2014 Freescale Semiconductor, Inc.
> + *
> + * Author: Jun Li
> + *
> + * 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 file mainly handles OTG fsm, it includes OTG fsm operations
> + * for HNP and SRP.
> + */
> +
> +#include <linux/usb/otg.h>
> +#include <linux/usb/gadget.h>
> +#include <linux/usb/chipidea.h>
> +
> +#include "ci.h"
> +#include "bits.h"
> +#include "otg.h"
> +#include "otg_fsm.h"
> +
> +int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
> +{
> + if (ci->platdata->dr_mode != USB_DR_MODE_OTG)
> + return 0;
> +
> + ci->transceiver->otg = devm_kzalloc(ci->dev,
> + sizeof(struct usb_otg), GFP_KERNEL);
> + if (!ci->transceiver->otg) {
> + dev_err(ci->dev,
> + "Failed to allocate usb_otg structure for ci hdrc otg!\n");
> + return -ENOMEM;
> + }
> +
> + ci->fsm = devm_kzalloc(ci->dev,
> + sizeof(struct otg_fsm), GFP_KERNEL);
> + if (!ci->fsm) {
> + dev_err(ci->dev,
> + "Failed to allocate otg_fsm structure for ci hdrc otg!\n");
> + return -ENOMEM;
> + }
> +
> + ci->fsm->power_up = 1;
> + ci->fsm->id = hw_read(ci, OP_OTGSC, OTGSC_ID);
> + ci->fsm->otg = ci->transceiver->otg;
> + ci->fsm->otg->phy = ci->transceiver;
> + ci->fsm->otg->gadget = &ci->gadget;
> + ci->transceiver->state = OTG_STATE_UNDEFINED;
> +
> + mutex_init(&ci->fsm->lock);
> +
> + /* enable ID and A vbus valid irq */
> + hw_write(ci, OP_OTGSC, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS,
> + OTGSC_IDIE | OTGSC_AVVIE);
At comment, you said it only set enable bits, but the code also
clear status bits if they are existed.
The status bits are cleared at: ci_get_otg_capable.
The IDIE is set at: ci_hdrc_probe.
So, it is better you only enable OTGSC_AVVIE since you
said dual-role switch has still worked if the user has
not enabled OTG.
Peter
> +
> + if (ci->fsm->id) {
> + ci->fsm->b_ssend_srp =
> + hw_read(ci, OP_OTGSC, OTGSC_BSV) ? 0 : 1;
> + ci->fsm->b_sess_vld =
> + hw_read(ci, OP_OTGSC, OTGSC_BSV) ? 1 : 0;
> + }
> +
> + return 0;
> +}
> diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h
> new file mode 100644
> index 0000000..bf20a85
> --- /dev/null
> +++ b/drivers/usb/chipidea/otg_fsm.h
> @@ -0,0 +1,29 @@
> +/*
> + * Copyright (C) 2014 Freescale Semiconductor, Inc.
> + *
> + * Author: Jun Li
> + *
> + * 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.
> + */
> +
> +#ifndef __DRIVERS_USB_CHIPIDEA_OTG_FSM_H
> +#define __DRIVERS_USB_CHIPIDEA_OTG_FSM_H
> +
> +#include <linux/usb/otg-fsm.h>
> +
> +#ifdef CONFIG_USB_OTG_FSM
> +
> +int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
> +
> +#else
> +
> +static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
> +{
> + return 0;
> +}
> +
> +#endif
> +
> +#endif /* __DRIVERS_USB_CHIPIDEA_OTG_FSM_H */
> --
> 1.7.8
>
>
--
Best Regards,
Peter Chen
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