blob: 6da7316f8e87d73d7edb8a8215ac886db381c9bc [file] [log] [blame]
Michal Nazarewicz5ab54cf2010-11-12 14:29:28 +01001/*
2 * g_ffs.c -- user mode file system API for USB composite function controllers
3 *
4 * Copyright (C) 2010 Samsung Electronics
Michal Nazarewicz54b83602012-01-13 15:05:16 +01005 * Author: Michal Nazarewicz <mina86@mina86.com>
Michal Nazarewicz5ab54cf2010-11-12 14:29:28 +01006 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
Michal Nazarewicz5ab54cf2010-11-12 14:29:28 +010011 */
12
Michal Nazarewiczaa02f172010-11-17 17:09:47 +010013#define pr_fmt(fmt) "g_ffs: " fmt
14
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020015#include <linux/module.h>
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +010016
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020017#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +010018#include <linux/netdevice.h>
19
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020020# if defined USB_ETH_RNDIS
21# undef USB_ETH_RNDIS
22# endif
23# ifdef CONFIG_USB_FUNCTIONFS_RNDIS
24# define USB_ETH_RNDIS y
25# endif
26
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +010027# include "u_ecm.h"
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +010028# include "u_gether.h"
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020029# ifdef USB_ETH_RNDIS
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +010030# include "u_rndis.h"
Andrzej Pietrasiewiczcbbd14a2013-05-24 10:23:02 +020031# include "rndis.h"
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020032# endif
Andrzej Pietrasiewiczf1a18232013-05-23 09:22:03 +020033# include "u_ether.h"
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020034
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +010035USB_ETHERNET_MODULE_PARAMETERS();
36
Michal Nazarewiczf8dae532010-06-25 16:29:27 +020037# ifdef CONFIG_USB_FUNCTIONFS_ETH
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +010038static int eth_bind_config(struct usb_configuration *c);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +010039static struct usb_function_instance *fi_ecm;
40static struct usb_function *f_ecm;
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +010041static struct usb_function_instance *fi_geth;
42static struct usb_function *f_geth;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020043# endif
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +010044# ifdef CONFIG_USB_FUNCTIONFS_RNDIS
45static int bind_rndis_config(struct usb_configuration *c);
46static struct usb_function_instance *fi_rndis;
47static struct usb_function *f_rndis;
48# endif
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020049#endif
50
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +010051#include "u_fs.h"
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020052
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020053#define DRIVER_NAME "g_ffs"
54#define DRIVER_DESC "USB Function Filesystem"
55#define DRIVER_VERSION "24 Aug 2004"
56
57MODULE_DESCRIPTION(DRIVER_DESC);
58MODULE_AUTHOR("Michal Nazarewicz");
59MODULE_LICENSE("GPL");
60
Michal Nazarewiczfc19de62010-08-12 17:43:48 +020061#define GFS_VENDOR_ID 0x1d6b /* Linux Foundation */
62#define GFS_PRODUCT_ID 0x0105 /* FunctionFS Gadget */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020063
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +020064#define GFS_MAX_DEVS 10
65
Sebastian Andrzej Siewior7d16e8d2012-09-10 15:01:53 +020066USB_GADGET_COMPOSITE_OPTIONS();
67
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020068static struct usb_device_descriptor gfs_dev_desc = {
69 .bLength = sizeof gfs_dev_desc,
70 .bDescriptorType = USB_DT_DEVICE,
71
Igor Kotrasinski0aecfc12015-10-20 18:33:13 +020072 /* .bcdUSB = DYNAMIC */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020073 .bDeviceClass = USB_CLASS_PER_INTERFACE,
74
Michal Nazarewiczfc19de62010-08-12 17:43:48 +020075 .idVendor = cpu_to_le16(GFS_VENDOR_ID),
76 .idProduct = cpu_to_le16(GFS_PRODUCT_ID),
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020077};
78
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +020079static char *func_names[GFS_MAX_DEVS];
80static unsigned int func_num;
81
Michal Nazarewiczfc19de62010-08-12 17:43:48 +020082module_param_named(bDeviceClass, gfs_dev_desc.bDeviceClass, byte, 0644);
83MODULE_PARM_DESC(bDeviceClass, "USB Device class");
84module_param_named(bDeviceSubClass, gfs_dev_desc.bDeviceSubClass, byte, 0644);
85MODULE_PARM_DESC(bDeviceSubClass, "USB Device subclass");
86module_param_named(bDeviceProtocol, gfs_dev_desc.bDeviceProtocol, byte, 0644);
87MODULE_PARM_DESC(bDeviceProtocol, "USB Device protocol");
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +020088module_param_array_named(functions, func_names, charp, &func_num, 0);
89MODULE_PARM_DESC(functions, "USB Functions list");
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020090
Li Jun75c93102015-07-09 15:18:53 +080091static const struct usb_descriptor_header *gfs_otg_desc[2];
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020092
Michal Nazarewicz5ab54cf2010-11-12 14:29:28 +010093/* String IDs are assigned dynamically */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020094static struct usb_string gfs_strings[] = {
Sebastian Andrzej Siewior276e2e42012-09-06 20:11:21 +020095 [USB_GADGET_MANUFACTURER_IDX].s = "",
Sebastian Andrzej Siewiord33f74f2012-09-10 15:01:57 +020096 [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
Sebastian Andrzej Siewior276e2e42012-09-06 20:11:21 +020097 [USB_GADGET_SERIAL_IDX].s = "",
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020098#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
Michal Nazarewiczf8dae532010-06-25 16:29:27 +020099 { .s = "FunctionFS + RNDIS" },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200100#endif
101#ifdef CONFIG_USB_FUNCTIONFS_ETH
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200102 { .s = "FunctionFS + ECM" },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200103#endif
104#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200105 { .s = "FunctionFS" },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200106#endif
107 { } /* end of list */
108};
109
110static struct usb_gadget_strings *gfs_dev_strings[] = {
111 &(struct usb_gadget_strings) {
112 .language = 0x0409, /* en-us */
113 .strings = gfs_strings,
114 },
115 NULL,
116};
117
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200118struct gfs_configuration {
119 struct usb_configuration c;
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100120 int (*eth)(struct usb_configuration *c);
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100121 int num;
Lad, Prabhakar2b87cd22015-02-05 13:11:47 +0000122};
123
124static struct gfs_configuration gfs_configurations[] = {
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200125#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200126 {
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100127 .eth = bind_rndis_config,
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200128 },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200129#endif
130
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200131#ifdef CONFIG_USB_FUNCTIONFS_ETH
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200132 {
133 .eth = eth_bind_config,
134 },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200135#endif
136
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200137#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200138 {
139 },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200140#endif
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200141};
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200142
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100143static void *functionfs_acquire_dev(struct ffs_dev *dev);
144static void functionfs_release_dev(struct ffs_dev *dev);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100145static int functionfs_ready_callback(struct ffs_data *ffs);
146static void functionfs_closed_callback(struct ffs_data *ffs);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200147static int gfs_bind(struct usb_composite_dev *cdev);
148static int gfs_unbind(struct usb_composite_dev *cdev);
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200149static int gfs_do_config(struct usb_configuration *c);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200150
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100151
Arnd Bergmannc94e2892015-04-11 00:14:21 +0200152static struct usb_composite_driver gfs_driver = {
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200153 .name = DRIVER_NAME,
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200154 .dev = &gfs_dev_desc,
155 .strings = gfs_dev_strings,
Tatyana Brokhman35a0e0b2011-06-29 16:41:49 +0300156 .max_speed = USB_SPEED_HIGH,
Sebastian Andrzej Siewior03e42bd2012-09-06 20:11:04 +0200157 .bind = gfs_bind,
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200158 .unbind = gfs_unbind,
159};
160
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200161static unsigned int missing_funcs;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200162static bool gfs_registered;
163static bool gfs_single_func;
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100164static struct usb_function_instance **fi_ffs;
165static struct usb_function **f_ffs[] = {
166#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
167 NULL,
168#endif
169
170#ifdef CONFIG_USB_FUNCTIONFS_ETH
171 NULL,
172#endif
173
174#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
175 NULL,
176#endif
177};
178
179#define N_CONF ARRAY_SIZE(f_ffs)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200180
Andrzej Pietrasiewicz8545e602012-03-12 12:55:42 +0100181static int __init gfs_init(void)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200182{
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100183 struct f_fs_opts *opts;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200184 int i;
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100185 int ret = 0;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200186
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200187 ENTER();
188
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100189 if (func_num < 2) {
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200190 gfs_single_func = true;
191 func_num = 1;
192 }
193
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100194 /*
195 * Allocate in one chunk for easier maintenance
196 */
197 f_ffs[0] = kcalloc(func_num * N_CONF, sizeof(*f_ffs), GFP_KERNEL);
198 if (!f_ffs[0]) {
199 ret = -ENOMEM;
200 goto no_func;
201 }
202 for (i = 1; i < N_CONF; ++i)
203 f_ffs[i] = f_ffs[0] + i * func_num;
204
205 fi_ffs = kcalloc(func_num, sizeof(*fi_ffs), GFP_KERNEL);
206 if (!fi_ffs) {
207 ret = -ENOMEM;
208 goto no_func;
209 }
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200210
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100211 for (i = 0; i < func_num; i++) {
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100212 fi_ffs[i] = usb_get_function_instance("ffs");
213 if (IS_ERR(fi_ffs[i])) {
214 ret = PTR_ERR(fi_ffs[i]);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100215 --i;
216 goto no_dev;
217 }
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100218 opts = to_f_fs_opts(fi_ffs[i]);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100219 if (gfs_single_func)
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100220 ret = ffs_single_dev(opts->dev);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100221 else
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100222 ret = ffs_name_dev(opts->dev, func_names[i]);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100223 if (ret)
224 goto no_dev;
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100225 opts->dev->ffs_ready_callback = functionfs_ready_callback;
226 opts->dev->ffs_closed_callback = functionfs_closed_callback;
227 opts->dev->ffs_acquire_dev_callback = functionfs_acquire_dev;
228 opts->dev->ffs_release_dev_callback = functionfs_release_dev;
229 opts->no_configfs = true;
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100230 }
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200231
232 missing_funcs = func_num;
233
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100234 return 0;
235no_dev:
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100236 while (i >= 0)
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100237 usb_put_function_instance(fi_ffs[i--]);
238 kfree(fi_ffs);
239no_func:
240 kfree(f_ffs[0]);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100241 return ret;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200242}
243module_init(gfs_init);
244
Andrzej Pietrasiewicz8545e602012-03-12 12:55:42 +0100245static void __exit gfs_exit(void)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200246{
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100247 int i;
248
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200249 ENTER();
250
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200251 if (gfs_registered)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200252 usb_composite_unregister(&gfs_driver);
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200253 gfs_registered = false;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200254
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100255 kfree(f_ffs[0]);
256
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100257 for (i = 0; i < func_num; i++)
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100258 usb_put_function_instance(fi_ffs[i]);
259
260 kfree(fi_ffs);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200261}
262module_exit(gfs_exit);
263
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100264static void *functionfs_acquire_dev(struct ffs_dev *dev)
265{
266 if (!try_module_get(THIS_MODULE))
Krzysztof Opasiakd668b4f2014-05-21 14:05:35 +0200267 return ERR_PTR(-ENOENT);
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200268
Lad, Prabhakar2b87cd22015-02-05 13:11:47 +0000269 return NULL;
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100270}
271
272static void functionfs_release_dev(struct ffs_dev *dev)
273{
274 module_put(THIS_MODULE);
275}
276
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100277/*
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200278 * The caller of this function takes ffs_lock
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100279 */
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200280static int functionfs_ready_callback(struct ffs_data *ffs)
281{
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100282 int ret = 0;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200283
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100284 if (--missing_funcs)
285 return 0;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200286
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100287 if (gfs_registered)
288 return -EBUSY;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200289
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200290 gfs_registered = true;
291
Sebastian Andrzej Siewior03e42bd2012-09-06 20:11:04 +0200292 ret = usb_composite_probe(&gfs_driver);
Krzysztof Opasiakc41b33c2015-05-22 17:25:17 +0200293 if (unlikely(ret < 0)) {
294 ++missing_funcs;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200295 gfs_registered = false;
Krzysztof Opasiakc41b33c2015-05-22 17:25:17 +0200296 }
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200297
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200298 return ret;
299}
300
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100301/*
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200302 * The caller of this function takes ffs_lock
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100303 */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200304static void functionfs_closed_callback(struct ffs_data *ffs)
305{
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200306 missing_funcs++;
307
308 if (gfs_registered)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200309 usb_composite_unregister(&gfs_driver);
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200310 gfs_registered = false;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200311}
312
313/*
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100314 * It is assumed that gfs_bind is called from a context where ffs_lock is held
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200315 */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200316static int gfs_bind(struct usb_composite_dev *cdev)
317{
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100318#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100319 struct net_device *net;
320#endif
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200321 int ret, i;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200322
323 ENTER();
324
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200325 if (missing_funcs)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200326 return -ENODEV;
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100327#if defined CONFIG_USB_FUNCTIONFS_ETH
328 if (can_support_ecm(cdev->gadget)) {
329 struct f_ecm_opts *ecm_opts;
330
331 fi_ecm = usb_get_function_instance("ecm");
332 if (IS_ERR(fi_ecm))
333 return PTR_ERR(fi_ecm);
334 ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100335 net = ecm_opts->net;
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100336 } else {
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100337 struct f_gether_opts *geth_opts;
338
339 fi_geth = usb_get_function_instance("geth");
340 if (IS_ERR(fi_geth))
341 return PTR_ERR(fi_geth);
342 geth_opts = container_of(fi_geth, struct f_gether_opts,
343 func_inst);
344 net = geth_opts->net;
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100345 }
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100346#endif
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100347
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100348#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
349 {
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100350 fi_rndis = usb_get_function_instance("rndis");
351 if (IS_ERR(fi_rndis)) {
352 ret = PTR_ERR(fi_rndis);
353 goto error;
354 }
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100355#ifndef CONFIG_USB_FUNCTIONFS_ETH
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200356 net = container_of(fi_rndis, struct f_rndis_opts,
357 func_inst)->net;
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100358#endif
359 }
360#endif
361
362#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS
363 gether_set_qmult(net, qmult);
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100364 if (!gether_set_host_addr(net, host_addr))
365 pr_info("using host ethernet address: %s", host_addr);
366 if (!gether_set_dev_addr(net, dev_addr))
367 pr_info("using self ethernet address: %s", dev_addr);
Sebastian Andrzej Siewiord6a01432012-12-23 21:10:12 +0100368#endif
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100369
370#if defined CONFIG_USB_FUNCTIONFS_RNDIS && defined CONFIG_USB_FUNCTIONFS_ETH
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100371 gether_set_gadget(net, cdev->gadget);
372 ret = gether_register_netdev(net);
373 if (ret)
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100374 goto error_rndis;
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100375
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100376 if (can_support_ecm(cdev->gadget)) {
377 struct f_ecm_opts *ecm_opts;
378
379 ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100380 ecm_opts->bound = true;
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100381 } else {
382 struct f_gether_opts *geth_opts;
383
384 geth_opts = container_of(fi_geth, struct f_gether_opts,
385 func_inst);
386 geth_opts->bound = true;
Sebastian Andrzej Siewiord6a01432012-12-23 21:10:12 +0100387 }
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100388
389 rndis_borrow_net(fi_rndis, net);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100390#endif
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200391
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100392 /* TODO: gstrings_attach? */
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200393 ret = usb_string_ids_tab(cdev, gfs_strings);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200394 if (unlikely(ret < 0))
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100395 goto error_rndis;
Sebastian Andrzej Siewiord33f74f2012-09-10 15:01:57 +0200396 gfs_dev_desc.iProduct = gfs_strings[USB_GADGET_PRODUCT_IDX].id;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200397
Li Jun75c93102015-07-09 15:18:53 +0800398 if (gadget_is_otg(cdev->gadget) && !gfs_otg_desc[0]) {
399 struct usb_descriptor_header *usb_desc;
400
401 usb_desc = usb_otg_descriptor_alloc(cdev->gadget);
402 if (!usb_desc)
403 goto error_rndis;
404 usb_otg_descriptor_init(cdev->gadget, usb_desc);
405 gfs_otg_desc[0] = usb_desc;
406 gfs_otg_desc[1] = NULL;
407 }
408
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200409 for (i = 0; i < ARRAY_SIZE(gfs_configurations); ++i) {
410 struct gfs_configuration *c = gfs_configurations + i;
Sebastian Andrzej Siewior276e2e42012-09-06 20:11:21 +0200411 int sid = USB_GADGET_FIRST_AVAIL_IDX + i;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200412
Sebastian Andrzej Siewior276e2e42012-09-06 20:11:21 +0200413 c->c.label = gfs_strings[sid].s;
414 c->c.iConfiguration = gfs_strings[sid].id;
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200415 c->c.bConfigurationValue = 1 + i;
416 c->c.bmAttributes = USB_CONFIG_ATT_SELFPOWER;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200417
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100418 c->num = i;
419
Uwe Kleine-Königc9bfff92010-08-12 17:43:55 +0200420 ret = usb_add_config(cdev, &c->c, gfs_do_config);
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200421 if (unlikely(ret < 0))
422 goto error_unbind;
423 }
Sebastian Andrzej Siewior7d16e8d2012-09-10 15:01:53 +0200424 usb_composite_overwrite_options(cdev, &coverwrite);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200425 return 0;
426
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100427/* TODO */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200428error_unbind:
Li Jun75c93102015-07-09 15:18:53 +0800429 kfree(gfs_otg_desc[0]);
430 gfs_otg_desc[0] = NULL;
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100431error_rndis:
432#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
433 usb_put_function_instance(fi_rndis);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200434error:
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100435#endif
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100436#if defined CONFIG_USB_FUNCTIONFS_ETH
437 if (can_support_ecm(cdev->gadget))
438 usb_put_function_instance(fi_ecm);
439 else
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100440 usb_put_function_instance(fi_geth);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100441#endif
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200442 return ret;
443}
444
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200445/*
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100446 * It is assumed that gfs_unbind is called from a context where ffs_lock is held
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200447 */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200448static int gfs_unbind(struct usb_composite_dev *cdev)
449{
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200450 int i;
451
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200452 ENTER();
453
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100454
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100455#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
456 usb_put_function(f_rndis);
457 usb_put_function_instance(fi_rndis);
458#endif
459
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100460#if defined CONFIG_USB_FUNCTIONFS_ETH
461 if (can_support_ecm(cdev->gadget)) {
462 usb_put_function(f_ecm);
463 usb_put_function_instance(fi_ecm);
464 } else {
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100465 usb_put_function(f_geth);
466 usb_put_function_instance(fi_geth);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100467 }
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100468#endif
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100469 for (i = 0; i < N_CONF * func_num; ++i)
470 usb_put_function(*(f_ffs[0] + i));
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200471
Li Jun75c93102015-07-09 15:18:53 +0800472 kfree(gfs_otg_desc[0]);
473 gfs_otg_desc[0] = NULL;
474
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200475 return 0;
476}
477
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200478/*
479 * It is assumed that gfs_do_config is called from a context where
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100480 * ffs_lock is held
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200481 */
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200482static int gfs_do_config(struct usb_configuration *c)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200483{
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200484 struct gfs_configuration *gc =
485 container_of(c, struct gfs_configuration, c);
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200486 int i;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200487 int ret;
488
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200489 if (missing_funcs)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200490 return -ENODEV;
491
492 if (gadget_is_otg(c->cdev->gadget)) {
493 c->descriptors = gfs_otg_desc;
494 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
495 }
496
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200497 if (gc->eth) {
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100498 ret = gc->eth(c);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200499 if (unlikely(ret < 0))
500 return ret;
501 }
502
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200503 for (i = 0; i < func_num; i++) {
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100504 f_ffs[gc->num][i] = usb_get_function(fi_ffs[i]);
505 if (IS_ERR(f_ffs[gc->num][i])) {
506 ret = PTR_ERR(f_ffs[gc->num][i]);
507 goto error;
508 }
509 ret = usb_add_function(c, f_ffs[gc->num][i]);
510 if (ret < 0) {
511 usb_put_function(f_ffs[gc->num][i]);
512 goto error;
513 }
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200514 }
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200515
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200516 /*
517 * After previous do_configs there may be some invalid
Michal Nazarewiczf588c0d2010-06-14 10:43:34 +0200518 * pointers in c->interface array. This happens every time
519 * a user space function with fewer interfaces than a user
520 * space function that was run before the new one is run. The
521 * compasit's set_config() assumes that if there is no more
522 * then MAX_CONFIG_INTERFACES interfaces in a configuration
523 * then there is a NULL pointer after the last interface in
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200524 * c->interface array. We need to make sure this is true.
525 */
Michal Nazarewiczf588c0d2010-06-14 10:43:34 +0200526 if (c->next_interface_id < ARRAY_SIZE(c->interface))
527 c->interface[c->next_interface_id] = NULL;
528
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200529 return 0;
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100530error:
531 while (--i >= 0) {
532 if (!IS_ERR(f_ffs[gc->num][i]))
533 usb_remove_function(c, f_ffs[gc->num][i]);
534 usb_put_function(f_ffs[gc->num][i]);
535 }
536 return ret;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200537}
538
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200539#ifdef CONFIG_USB_FUNCTIONFS_ETH
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200540
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100541static int eth_bind_config(struct usb_configuration *c)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200542{
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100543 int status = 0;
544
545 if (can_support_ecm(c->cdev->gadget)) {
546 f_ecm = usb_get_function(fi_ecm);
547 if (IS_ERR(f_ecm))
548 return PTR_ERR(f_ecm);
549
550 status = usb_add_function(c, f_ecm);
551 if (status < 0)
552 usb_put_function(f_ecm);
553
554 } else {
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100555 f_geth = usb_get_function(fi_geth);
556 if (IS_ERR(f_geth))
557 return PTR_ERR(f_geth);
558
559 status = usb_add_function(c, f_geth);
560 if (status < 0)
561 usb_put_function(f_geth);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100562 }
563 return status;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200564}
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200565
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200566#endif
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100567
568#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
569
570static int bind_rndis_config(struct usb_configuration *c)
571{
572 int status = 0;
573
574 f_rndis = usb_get_function(fi_rndis);
575 if (IS_ERR(f_rndis))
576 return PTR_ERR(f_rndis);
577
578 status = usb_add_function(c, f_rndis);
579 if (status < 0)
580 usb_put_function(f_rndis);
581
582 return status;
583}
584
585#endif