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Commit 83408745 authored by Andrzej Pietrasiewicz's avatar Andrzej Pietrasiewicz Committed by Felipe Balbi
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usb: gadget: f_phonet: add configfs support 



f_phonet learns about configfs so we can remove
in-kernel gadget drivers.

Signed-off-by: default avatarAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent b904d081

Documentation/ABI/testing/configfs-usb-gadget-phonet

0 → 100644
+8 −0
Original line number Diff line number Diff line 
What:		/config/usb-gadget/gadget/functions/phonet.name

Date:		May 2013

KenelVersion:	3.11

Description:



		This item contains just one readonly attribute: ifname.

		It contains the network interface name assigned during

		network device registration.

drivers/usb/gadget/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -541,6 +541,16 @@ choice 


# this first set of drivers all depend on bulk-capable hardware.



config USB_CONFIGFS_PHONET

	boolean "Phonet protocol"

	depends on USB_CONFIGFS

	depends on NET

	depends on PHONET

	select USB_U_ETHER

	select USB_F_PHONET

	help

	  The Phonet protocol implementation for USB device.



config USB_ZERO

	tristate "Gadget Zero (DEVELOPMENT)"

	select USB_LIBCOMPOSITE

drivers/usb/gadget/f_phonet.c

+56 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/usb/composite.h>



#include "u_phonet.h"

#include "u_ether.h"



#define PN_MEDIA_USB	0x1B

#define MAXPACKET	512
@@ -581,6 +582,58 @@ err: 
	return status;

}



static inline struct f_phonet_opts *to_f_phonet_opts(struct config_item *item)

{

	return container_of(to_config_group(item), struct f_phonet_opts,

			func_inst.group);

}



CONFIGFS_ATTR_STRUCT(f_phonet_opts);

static ssize_t f_phonet_attr_show(struct config_item *item,

				struct configfs_attribute *attr,

				char *page)

{

	struct f_phonet_opts *opts = to_f_phonet_opts(item);

	struct f_phonet_opts_attribute *f_phonet_opts_attr =

		container_of(attr, struct f_phonet_opts_attribute, attr);

	ssize_t ret = 0;



	if (f_phonet_opts_attr->show)

		ret = f_phonet_opts_attr->show(opts, page);

	return ret;

}



static void phonet_attr_release(struct config_item *item)

{

	struct f_phonet_opts *opts = to_f_phonet_opts(item);



	usb_put_function_instance(&opts->func_inst);

}



static struct configfs_item_operations phonet_item_ops = {

	.release		= phonet_attr_release,

	.show_attribute		= f_phonet_attr_show,

};



static ssize_t f_phonet_ifname_show(struct f_phonet_opts *opts, char *page)

{

	return gether_get_ifname(opts->net, page, PAGE_SIZE);

}



static struct f_phonet_opts_attribute f_phonet_ifname =

	__CONFIGFS_ATTR_RO(ifname, f_phonet_ifname_show);



static struct configfs_attribute *phonet_attrs[] = {

	&f_phonet_ifname.attr,

	NULL,

};



static struct config_item_type phonet_func_type = {

	.ct_item_ops	= &phonet_item_ops,

	.ct_attrs	= phonet_attrs,

	.ct_owner	= THIS_MODULE,

};



static void phonet_free_inst(struct usb_function_instance *f)

{

	struct f_phonet_opts *opts;
@@ -606,6 +659,9 @@ static struct usb_function_instance *phonet_alloc_inst(void) 
	if (IS_ERR(opts->net))

		return ERR_PTR(PTR_ERR(opts->net));



	config_group_init_type_name(&opts->func_inst.group, "",

			&phonet_func_type);



	return &opts->func_inst;

}