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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: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andrzej Pietrasiewicz 2013-05-23 10:51:15 +02:00 committed by Felipe Balbi
parent b904d0811d
commit 83408745b2
3 changed files with 74 additions and 0 deletions
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8
Documentation/ABI/testing/configfs-usb-gadget-phonet Normal file
View File

@ -0,0 +1,8 @@
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.

10
drivers/usb/gadget/Kconfig
View File

@ -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

56
drivers/usb/gadget/f_phonet.c
View File

@ -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 @@ static int pn_bind(struct usb_configuration *c, struct usb_function *f)
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;
}