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Commit da92801c authored by Andrzej Pietrasiewicz's avatar Andrzej Pietrasiewicz Committed by Felipe Balbi
Browse files

usb: gadget: f_ecm: add configfs support 



f_ecm learns about our new configfs-based binding.

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 06b72598

drivers/usb/gadget/f_ecm.c

+49 −1
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/etherdevice.h>



#include "u_ether.h"

#include "u_ether_configfs.h"

#include "u_ecm.h"
@@ -706,8 +707,10 @@ ecm_bind(struct usb_configuration *c, struct usb_function *f) 
	 * with regard to ecm_opts->bound access

	 */

	if (!ecm_opts->bound) {

		mutex_lock(&ecm_opts->lock);

		gether_set_gadget(ecm_opts->net, cdev->gadget);

		status = gether_register_netdev(ecm_opts->net);

		mutex_unlock(&ecm_opts->lock);

		if (status)

			return status;

		ecm_opts->bound = true;
@@ -899,6 +902,41 @@ ecm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN], 


#else



static inline struct f_ecm_opts *to_f_ecm_opts(struct config_item *item)

{

	return container_of(to_config_group(item), struct f_ecm_opts,

			    func_inst.group);

}



/* f_ecm_item_ops */

USB_ETHERNET_CONFIGFS_ITEM(ecm);



/* f_ecm_opts_dev_addr */

USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(ecm);



/* f_ecm_opts_host_addr */

USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(ecm);



/* f_ecm_opts_qmult */

USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(ecm);



/* f_ecm_opts_ifname */

USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(ecm);



static struct configfs_attribute *ecm_attrs[] = {

	&f_ecm_opts_dev_addr.attr,

	&f_ecm_opts_host_addr.attr,

	&f_ecm_opts_qmult.attr,

	&f_ecm_opts_ifname.attr,

	NULL,

};



static struct config_item_type ecm_func_type = {

	.ct_item_ops	= &ecm_item_ops,

	.ct_attrs	= ecm_attrs,

	.ct_owner	= THIS_MODULE,

};



static void ecm_free_inst(struct usb_function_instance *f)

{

	struct f_ecm_opts *opts;
@@ -918,21 +956,28 @@ static struct usb_function_instance *ecm_alloc_inst(void) 
	opts = kzalloc(sizeof(*opts), GFP_KERNEL);

	if (!opts)

		return ERR_PTR(-ENOMEM);



	mutex_init(&opts->lock);

	opts->func_inst.free_func_inst = ecm_free_inst;

	opts->net = gether_setup_default();

	if (IS_ERR(opts->net))

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



	config_group_init_type_name(&opts->func_inst.group, "", &ecm_func_type);



	return &opts->func_inst;

}



static void ecm_free(struct usb_function *f)

{

	struct f_ecm *ecm;

	struct f_ecm_opts *opts;



	ecm = func_to_ecm(f);

	opts = container_of(f->fi, struct f_ecm_opts, func_inst);

	kfree(ecm);

	mutex_lock(&opts->lock);

	opts->refcnt--;

	mutex_unlock(&opts->lock);

}



static void ecm_unbind(struct usb_configuration *c, struct usb_function *f)
@@ -959,6 +1004,8 @@ struct usb_function *ecm_alloc(struct usb_function_instance *fi) 
		return ERR_PTR(-ENOMEM);



	opts = container_of(fi, struct f_ecm_opts, func_inst);

	mutex_lock(&opts->lock);

	opts->refcnt++;



	/* export host's Ethernet address in CDC format */

	status = gether_get_host_addr_cdc(opts->net, ecm->ethaddr,
@@ -970,6 +1017,7 @@ struct usb_function *ecm_alloc(struct usb_function_instance *fi) 
	ecm_string_defs[1].s = ecm->ethaddr;



	ecm->port.ioport = netdev_priv(opts->net);

	mutex_unlock(&opts->lock);

	ecm->port.cdc_filter = DEFAULT_FILTER;



	ecm->port.func.name = "cdc_ethernet";

drivers/usb/gadget/u_ecm.h

+9 −0
Original line number Diff line number Diff line
@@ -22,6 +22,15 @@ struct f_ecm_opts { 
	struct usb_function_instance	func_inst;

	struct net_device		*net;

	bool				bound;



	/*

	 * Read/write access to configfs attributes is handled by configfs.

	 *

	 * This is to protect the data from concurrent access by read/write

	 * and create symlink/remove symlink.

	 */

	struct mutex			lock;

	int				refcnt;

};



#endif /* U_ECM_H */