Commit fee562a6 authored by Andrzej Pietrasiewicz's avatar Andrzej Pietrasiewicz Committed by Felipe Balbi

usb: gadget: f_ecm: convert to new function interface with backward compatibility

Converting ecm to the new function interface requires converting
the USB ecm's function code and its users.

This patch converts the f_ecm.c to the new function interface.

The file is now compiled into a separate usb_f_ecm.ko module.

The old function interface is provided by means of a preprocessor
conditional directives. After all users are converted, the old interface
can be removed.
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 aa83c6ad
......@@ -514,6 +514,9 @@ config USB_F_OBEX
config USB_F_NCM
tristate
config USB_F_ECM
tristate
choice
tristate "USB Gadget Drivers"
default USB_ETH
......
......@@ -50,6 +50,8 @@ u_rndis-y := rndis.o
obj-$(CONFIG_USB_U_RNDIS) += u_rndis.o
usb_f_ncm-y := f_ncm.o
obj-$(CONFIG_USB_F_NCM) += usb_f_ncm.o
usb_f_ecm-y := f_ecm.o
obj-$(CONFIG_USB_F_ECM) += usb_f_ecm.o
#
# USB gadget drivers
......
......@@ -44,6 +44,7 @@ USB_ETHERNET_MODULE_PARAMETERS();
* the runtime footprint, and giving us at least some parts of what
* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
*/
#define USBF_ECM_INCLUDED
#include "f_ecm.c"
/*-------------------------------------------------------------------------*/
......
......@@ -102,6 +102,7 @@ static inline bool has_rndis(void)
* the runtime footprint, and giving us at least some parts of what
* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
*/
#define USBF_ECM_INCLUDED
#include "f_ecm.c"
#include "f_subset.c"
#ifdef USB_ETH_RNDIS
......
......@@ -14,10 +14,12 @@
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/etherdevice.h>
#include "u_ether.h"
#include "u_ecm.h"
/*
......@@ -687,6 +689,40 @@ ecm_bind(struct usb_configuration *c, struct usb_function *f)
int status;
struct usb_ep *ep;
#ifndef USBF_ECM_INCLUDED
struct f_ecm_opts *ecm_opts;
if (!can_support_ecm(cdev->gadget))
return -EINVAL;
ecm_opts = container_of(f->fi, struct f_ecm_opts, func_inst);
/*
* in drivers/usb/gadget/configfs.c:configfs_composite_bind()
* configurations are bound in sequence with list_for_each_entry,
* in each configuration its functions are bound in sequence
* with list_for_each_entry, so we assume no race condition
* with regard to ecm_opts->bound access
*/
if (!ecm_opts->bound) {
gether_set_gadget(ecm_opts->net, cdev->gadget);
status = gether_register_netdev(ecm_opts->net);
if (status)
return status;
ecm_opts->bound = true;
}
#endif
if (ecm_string_defs[0].id == 0) {
status = usb_string_ids_tab(c->cdev, ecm_string_defs);
if (status)
return status;
ecm_control_intf.iInterface = ecm_string_defs[0].id;
ecm_data_intf.iInterface = ecm_string_defs[2].id;
ecm_desc.iMACAddress = ecm_string_defs[1].id;
ecm_iad_descriptor.iFunction = ecm_string_defs[3].id;
}
/* allocate instance-specific interface IDs */
status = usb_interface_id(c, f);
if (status < 0)
......@@ -796,8 +832,10 @@ ecm_bind(struct usb_configuration *c, struct usb_function *f)
return status;
}
#ifdef USBF_ECM_INCLUDED
static void
ecm_unbind(struct usb_configuration *c, struct usb_function *f)
ecm_old_unbind(struct usb_configuration *c, struct usb_function *f)
{
struct f_ecm *ecm = func_to_ecm(f);
......@@ -834,17 +872,6 @@ ecm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
if (!can_support_ecm(c->cdev->gadget) || !ethaddr)
return -EINVAL;
if (ecm_string_defs[0].id == 0) {
status = usb_string_ids_tab(c->cdev, ecm_string_defs);
if (status)
return status;
ecm_control_intf.iInterface = ecm_string_defs[0].id;
ecm_data_intf.iInterface = ecm_string_defs[2].id;
ecm_desc.iMACAddress = ecm_string_defs[1].id;
ecm_iad_descriptor.iFunction = ecm_string_defs[3].id;
}
/* allocate and initialize one new instance */
ecm = kzalloc(sizeof *ecm, GFP_KERNEL);
if (!ecm)
......@@ -861,7 +888,7 @@ ecm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
ecm->port.func.strings = ecm_strings;
/* descriptors are per-instance copies */
ecm->port.func.bind = ecm_bind;
ecm->port.func.unbind = ecm_unbind;
ecm->port.func.unbind = ecm_old_unbind;
ecm->port.func.set_alt = ecm_set_alt;
ecm->port.func.get_alt = ecm_get_alt;
ecm->port.func.setup = ecm_setup;
......@@ -872,3 +899,99 @@ ecm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
kfree(ecm);
return status;
}
#else
static void ecm_free_inst(struct usb_function_instance *f)
{
struct f_ecm_opts *opts;
opts = container_of(f, struct f_ecm_opts, func_inst);
if (opts->bound)
gether_cleanup(netdev_priv(opts->net));
else
free_netdev(opts->net);
kfree(opts);
}
static struct usb_function_instance *ecm_alloc_inst(void)
{
struct f_ecm_opts *opts;
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
if (!opts)
return ERR_PTR(-ENOMEM);
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));
return &opts->func_inst;
}
static void ecm_free(struct usb_function *f)
{
struct f_ecm *ecm;
ecm = func_to_ecm(f);
kfree(ecm);
}
static void ecm_unbind(struct usb_configuration *c, struct usb_function *f)
{
struct f_ecm *ecm = func_to_ecm(f);
DBG(c->cdev, "ecm unbind\n");
ecm_string_defs[0].id = 0;
usb_free_all_descriptors(f);
kfree(ecm->notify_req->buf);
usb_ep_free_request(ecm->notify, ecm->notify_req);
}
struct usb_function *ecm_alloc(struct usb_function_instance *fi)
{
struct f_ecm *ecm;
struct f_ecm_opts *opts;
int status;
/* allocate and initialize one new instance */
ecm = kzalloc(sizeof(*ecm), GFP_KERNEL);
if (!ecm)
return ERR_PTR(-ENOMEM);
opts = container_of(fi, struct f_ecm_opts, func_inst);
/* export host's Ethernet address in CDC format */
status = gether_get_host_addr_cdc(opts->net, ecm->ethaddr,
sizeof(ecm->ethaddr));
if (status < 12) {
kfree(ecm);
return ERR_PTR(-EINVAL);
}
ecm_string_defs[1].s = ecm->ethaddr;
ecm->port.ioport = netdev_priv(opts->net);
ecm->port.cdc_filter = DEFAULT_FILTER;
ecm->port.func.name = "cdc_ethernet";
ecm->port.func.strings = ecm_strings;
/* descriptors are per-instance copies */
ecm->port.func.bind = ecm_bind;
ecm->port.func.unbind = ecm_unbind;
ecm->port.func.set_alt = ecm_set_alt;
ecm->port.func.get_alt = ecm_get_alt;
ecm->port.func.setup = ecm_setup;
ecm->port.func.disable = ecm_disable;
ecm->port.func.free_func = ecm_free;
return &ecm->port.func;
}
DECLARE_USB_FUNCTION_INIT(ecm, ecm_alloc_inst, ecm_alloc);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Brownell");
#endif
......@@ -28,6 +28,7 @@
# define USB_ETH_RNDIS y
# endif
#define USBF_ECM_INCLUDED
# include "f_ecm.c"
# include "f_subset.c"
# ifdef USB_ETH_RNDIS
......
......@@ -43,6 +43,7 @@ MODULE_LICENSE("GPL");
*/
#include "f_mass_storage.c"
#define USBF_ECM_INCLUDED
#include "f_ecm.c"
#include "f_subset.c"
#ifdef USB_ETH_RNDIS
......
......@@ -37,8 +37,9 @@
* the runtime footprint, and giving us at least some parts of what
* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
*/
#define USBF_OBEX_INCLUDED
#define USBF_ECM_INCLUDED
#include "f_ecm.c"
#define USBF_OBEX_INCLUDED
#include "f_obex.c"
#include "f_phonet.c"
#include "u_ether.h"
......
/*
* u_ecm.h
*
* Utility definitions for the ecm function
*
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef U_ECM_H
#define U_ECM_H
#include <linux/usb/composite.h>
struct f_ecm_opts {
struct usb_function_instance func_inst;
struct net_device *net;
bool bound;
};
#endif /* U_ECM_H */
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