57677be5ef
This patch adds OTG fsm related initialization when do otg init, add a seperate file for OTG fsm related utilities. Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Li Jun <b47624@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/*
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* otg_fsm.c - ChipIdea USB IP core OTG FSM driver
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*
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* Copyright (C) 2014 Freescale Semiconductor, Inc.
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*
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* Author: Jun Li
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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* This file mainly handles OTG fsm, it includes OTG fsm operations
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* for HNP and SRP.
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*/
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#include <linux/usb/otg.h>
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#include <linux/usb/gadget.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/chipidea.h>
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#include "ci.h"
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#include "bits.h"
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#include "otg.h"
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#include "otg_fsm.h"
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int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
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{
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struct usb_otg *otg;
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otg = devm_kzalloc(ci->dev,
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sizeof(struct usb_otg), GFP_KERNEL);
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if (!otg) {
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dev_err(ci->dev,
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"Failed to allocate usb_otg structure for ci hdrc otg!\n");
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return -ENOMEM;
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}
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otg->phy = ci->transceiver;
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otg->gadget = &ci->gadget;
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ci->fsm.otg = otg;
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ci->transceiver->otg = ci->fsm.otg;
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ci->fsm.power_up = 1;
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ci->fsm.id = hw_read_otgsc(ci, OTGSC_ID) ? 1 : 0;
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ci->transceiver->state = OTG_STATE_UNDEFINED;
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mutex_init(&ci->fsm.lock);
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/* Enable A vbus valid irq */
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hw_write_otgsc(ci, OTGSC_AVVIE, OTGSC_AVVIE);
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if (ci->fsm.id) {
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ci->fsm.b_ssend_srp =
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hw_read_otgsc(ci, OTGSC_BSV) ? 0 : 1;
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ci->fsm.b_sess_vld =
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hw_read_otgsc(ci, OTGSC_BSV) ? 1 : 0;
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/* Enable BSV irq */
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hw_write_otgsc(ci, OTGSC_BSVIE, OTGSC_BSVIE);
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}
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return 0;
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}
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