forked from luck/tmp_suning_uos_patched
f940fcd8ea
With module.h being implicitly everywhere via device.h, the absence of explicitly including something for EXPORT_SYMBOL went unnoticed. Since we are heading to fix things up and clean module.h from the device.h file, we need to explicitly include these files now. Use the lightweight version of the header that has just THIS_MODULE and EXPORT_SYMBOL variants. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/*
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* otg.c -- USB OTG utility code
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*
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* Copyright (C) 2004 Texas Instruments
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/device.h>
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#include <linux/usb/otg.h>
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static struct otg_transceiver *xceiv;
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/**
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* otg_get_transceiver - find the (single) OTG transceiver
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*
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* Returns the transceiver driver, after getting a refcount to it; or
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* null if there is no such transceiver. The caller is responsible for
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* calling otg_put_transceiver() to release that count.
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*
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* For use by USB host and peripheral drivers.
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*/
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struct otg_transceiver *otg_get_transceiver(void)
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{
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if (xceiv)
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get_device(xceiv->dev);
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return xceiv;
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}
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EXPORT_SYMBOL(otg_get_transceiver);
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/**
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* otg_put_transceiver - release the (single) OTG transceiver
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* @x: the transceiver returned by otg_get_transceiver()
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*
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* Releases a refcount the caller received from otg_get_transceiver().
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*
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* For use by USB host and peripheral drivers.
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*/
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void otg_put_transceiver(struct otg_transceiver *x)
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{
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if (x)
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put_device(x->dev);
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}
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EXPORT_SYMBOL(otg_put_transceiver);
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/**
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* otg_set_transceiver - declare the (single) OTG transceiver
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* @x: the USB OTG transceiver to be used; or NULL
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*
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* This call is exclusively for use by transceiver drivers, which
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* coordinate the activities of drivers for host and peripheral
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* controllers, and in some cases for VBUS current regulation.
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*/
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int otg_set_transceiver(struct otg_transceiver *x)
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{
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if (xceiv && x)
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return -EBUSY;
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xceiv = x;
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return 0;
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}
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EXPORT_SYMBOL(otg_set_transceiver);
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const char *otg_state_string(enum usb_otg_state state)
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{
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switch (state) {
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case OTG_STATE_A_IDLE:
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return "a_idle";
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case OTG_STATE_A_WAIT_VRISE:
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return "a_wait_vrise";
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case OTG_STATE_A_WAIT_BCON:
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return "a_wait_bcon";
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case OTG_STATE_A_HOST:
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return "a_host";
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case OTG_STATE_A_SUSPEND:
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return "a_suspend";
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case OTG_STATE_A_PERIPHERAL:
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return "a_peripheral";
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case OTG_STATE_A_WAIT_VFALL:
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return "a_wait_vfall";
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case OTG_STATE_A_VBUS_ERR:
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return "a_vbus_err";
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case OTG_STATE_B_IDLE:
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return "b_idle";
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case OTG_STATE_B_SRP_INIT:
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return "b_srp_init";
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case OTG_STATE_B_PERIPHERAL:
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return "b_peripheral";
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case OTG_STATE_B_WAIT_ACON:
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return "b_wait_acon";
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case OTG_STATE_B_HOST:
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return "b_host";
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default:
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return "UNDEFINED";
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}
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}
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EXPORT_SYMBOL(otg_state_string);
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