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USB: otg: sharable otg transceiver ops

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Move otg_get/set/put_transceiver() from omap specific code
to common otg.c so other upcoming drivers can share them.

[ dbrownell@users.sourceforge.net: move to drivers/usb/otg, dox ]

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <me@felipebalbi.com>
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tony Lindgren 2008-11-24 12:02:21 -08:00 • committed by Greg Kroah-Hartman
parent 68144e0cc9
commit 3cb22d6586
3 changed files with 71 additions and 43 deletions
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38
arch/arm/plat-omap/usb.c
View file

@ -77,44 +77,6 @@
/*-------------------------------------------------------------------------*/
#if defined(CONFIG_ARCH_OMAP_OTG) || defined(CONFIG_USB_MUSB_OTG)
static struct otg_transceiver *xceiv;
/**
* otg_get_transceiver - find the (single) OTG transceiver driver
*
* Returns the transceiver driver, after getting a refcount to it; or
* null if there is no such transceiver. The caller is responsible for
* releasing that count.
*/
struct otg_transceiver *otg_get_transceiver(void)
{
if (xceiv)
get_device(xceiv->dev);
return xceiv;
}
EXPORT_SYMBOL(otg_get_transceiver);
void otg_put_transceiver(struct otg_transceiver *x)
{
put_device(x->dev);
}
EXPORT_SYMBOL(otg_put_transceiver);
int otg_set_transceiver(struct otg_transceiver *x)
{
if (xceiv && x)
return -EBUSY;
xceiv = x;
return 0;
}
EXPORT_SYMBOL(otg_set_transceiver);
#endif
/*-------------------------------------------------------------------------*/
#if defined(CONFIG_ARCH_OMAP_OTG) || defined(CONFIG_ARCH_OMAP15XX)
static void omap2_usb_devconf_clear(u8 port, u32 mask)

11
drivers/usb/otg/Makefile
View file

@ -2,12 +2,13 @@
# OTG infrastructure and transceiver drivers
#
# infrastructure
obj-$(CONFIG_USB_OTG_UTILS) += otg.o
# transceiver drivers
obj-$(CONFIG_USB_GPIO_VBUS) += gpio_vbus.o
obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
ifeq ($(CONFIG_USB_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
else ifeq ($(CONFIG_USB_GADGET_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
endif
ccflags-$(CONFIG_USB_DEBUG) += -DDEBUG
ccflags-$(CONFIG_USB_GADGET_DEBUG) += -DDEBUG

65
drivers/usb/otg/otg.c Normal file
View file

@ -0,0 +1,65 @@
/*
* otg.c -- USB OTG utility code
*
* Copyright (C) 2004 Texas Instruments
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/usb/otg.h>
static struct otg_transceiver *xceiv;
/**
* otg_get_transceiver - find the (single) OTG transceiver
*
* Returns the transceiver driver, after getting a refcount to it; or
* null if there is no such transceiver. The caller is responsible for
* calling otg_put_transceiver() to release that count.
*
* For use by USB host and peripheral drivers.
*/
struct otg_transceiver *otg_get_transceiver(void)
{
if (xceiv)
get_device(xceiv->dev);
return xceiv;
}
EXPORT_SYMBOL(otg_get_transceiver);
/**
* otg_put_transceiver - release the (single) OTG transceiver
* @x: the transceiver returned by otg_get_transceiver()
*
* Releases a refcount the caller received from otg_get_transceiver().
*
* For use by USB host and peripheral drivers.
*/
void otg_put_transceiver(struct otg_transceiver *x)
{
put_device(x->dev);
}
EXPORT_SYMBOL(otg_put_transceiver);
/**
* otg_set_transceiver - declare the (single) OTG transceiver
* @x: the USB OTG transceiver to be used; or NULL
*
* This call is exclusively for use by transceiver drivers, which
* coordinate the activities of drivers for host and peripheral
* controllers, and in some cases for VBUS current regulation.
*/
int otg_set_transceiver(struct otg_transceiver *x)
{
if (xceiv && x)
return -EBUSY;
xceiv = x;
return 0;
}
EXPORT_SYMBOL(otg_set_transceiver);