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Greg Kroah-Hartman5fd54ac2017-11-03 11:28:30 +01001// SPDX-License-Identifier: GPL-2.0+
Michal Nazarewicz5ab54cf2010-11-12 14:29:28 +01002/*
3 * g_ffs.c -- user mode file system API for USB composite function controllers
4 *
5 * Copyright (C) 2010 Samsung Electronics
Michal Nazarewicz54b83602012-01-13 15:05:16 +01006 * Author: Michal Nazarewicz <mina86@mina86.com>
Michal Nazarewicz5ab54cf2010-11-12 14:29:28 +01007 */
8
Michal Nazarewiczaa02f172010-11-17 17:09:47 +01009#define pr_fmt(fmt) "g_ffs: " fmt
10
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020011#include <linux/module.h>
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +010012
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020013#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +010014#include <linux/netdevice.h>
15
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020016# if defined USB_ETH_RNDIS
17# undef USB_ETH_RNDIS
18# endif
19# ifdef CONFIG_USB_FUNCTIONFS_RNDIS
20# define USB_ETH_RNDIS y
21# endif
22
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +010023# include "u_ecm.h"
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +010024# include "u_gether.h"
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020025# ifdef USB_ETH_RNDIS
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +010026# include "u_rndis.h"
Andrzej Pietrasiewiczcbbd14a2013-05-24 10:23:02 +020027# include "rndis.h"
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020028# endif
Andrzej Pietrasiewiczf1a18232013-05-23 09:22:03 +020029# include "u_ether.h"
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020030
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +010031USB_ETHERNET_MODULE_PARAMETERS();
32
Michal Nazarewiczf8dae532010-06-25 16:29:27 +020033# ifdef CONFIG_USB_FUNCTIONFS_ETH
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +010034static int eth_bind_config(struct usb_configuration *c);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +010035static struct usb_function_instance *fi_ecm;
36static struct usb_function *f_ecm;
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +010037static struct usb_function_instance *fi_geth;
38static struct usb_function *f_geth;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020039# endif
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +010040# ifdef CONFIG_USB_FUNCTIONFS_RNDIS
41static int bind_rndis_config(struct usb_configuration *c);
42static struct usb_function_instance *fi_rndis;
43static struct usb_function *f_rndis;
44# endif
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020045#endif
46
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +010047#include "u_fs.h"
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020048
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020049#define DRIVER_NAME "g_ffs"
50#define DRIVER_DESC "USB Function Filesystem"
51#define DRIVER_VERSION "24 Aug 2004"
52
53MODULE_DESCRIPTION(DRIVER_DESC);
54MODULE_AUTHOR("Michal Nazarewicz");
55MODULE_LICENSE("GPL");
56
Michal Nazarewiczfc19de62010-08-12 17:43:48 +020057#define GFS_VENDOR_ID 0x1d6b /* Linux Foundation */
58#define GFS_PRODUCT_ID 0x0105 /* FunctionFS Gadget */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020059
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +020060#define GFS_MAX_DEVS 10
61
Sebastian Andrzej Siewior7d16e8d2012-09-10 15:01:53 +020062USB_GADGET_COMPOSITE_OPTIONS();
63
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020064static struct usb_device_descriptor gfs_dev_desc = {
65 .bLength = sizeof gfs_dev_desc,
66 .bDescriptorType = USB_DT_DEVICE,
67
Igor Kotrasinski0aecfc12015-10-20 18:33:13 +020068 /* .bcdUSB = DYNAMIC */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020069 .bDeviceClass = USB_CLASS_PER_INTERFACE,
70
Michal Nazarewiczfc19de62010-08-12 17:43:48 +020071 .idVendor = cpu_to_le16(GFS_VENDOR_ID),
72 .idProduct = cpu_to_le16(GFS_PRODUCT_ID),
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020073};
74
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +020075static char *func_names[GFS_MAX_DEVS];
76static unsigned int func_num;
77
Michal Nazarewiczfc19de62010-08-12 17:43:48 +020078module_param_named(bDeviceClass, gfs_dev_desc.bDeviceClass, byte, 0644);
79MODULE_PARM_DESC(bDeviceClass, "USB Device class");
80module_param_named(bDeviceSubClass, gfs_dev_desc.bDeviceSubClass, byte, 0644);
81MODULE_PARM_DESC(bDeviceSubClass, "USB Device subclass");
82module_param_named(bDeviceProtocol, gfs_dev_desc.bDeviceProtocol, byte, 0644);
83MODULE_PARM_DESC(bDeviceProtocol, "USB Device protocol");
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +020084module_param_array_named(functions, func_names, charp, &func_num, 0);
85MODULE_PARM_DESC(functions, "USB Functions list");
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020086
Li Jun75c93102015-07-09 15:18:53 +080087static const struct usb_descriptor_header *gfs_otg_desc[2];
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020088
Michal Nazarewicz5ab54cf2010-11-12 14:29:28 +010089/* String IDs are assigned dynamically */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020090static struct usb_string gfs_strings[] = {
Sebastian Andrzej Siewior276e2e42012-09-06 20:11:21 +020091 [USB_GADGET_MANUFACTURER_IDX].s = "",
Sebastian Andrzej Siewiord33f74f2012-09-10 15:01:57 +020092 [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
Sebastian Andrzej Siewior276e2e42012-09-06 20:11:21 +020093 [USB_GADGET_SERIAL_IDX].s = "",
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020094#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
Michal Nazarewiczf8dae532010-06-25 16:29:27 +020095 { .s = "FunctionFS + RNDIS" },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020096#endif
97#ifdef CONFIG_USB_FUNCTIONFS_ETH
Michal Nazarewiczf8dae532010-06-25 16:29:27 +020098 { .s = "FunctionFS + ECM" },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +020099#endif
100#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200101 { .s = "FunctionFS" },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200102#endif
103 { } /* end of list */
104};
105
106static struct usb_gadget_strings *gfs_dev_strings[] = {
107 &(struct usb_gadget_strings) {
108 .language = 0x0409, /* en-us */
109 .strings = gfs_strings,
110 },
111 NULL,
112};
113
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200114struct gfs_configuration {
115 struct usb_configuration c;
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100116 int (*eth)(struct usb_configuration *c);
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100117 int num;
Lad, Prabhakar2b87cd22015-02-05 13:11:47 +0000118};
119
120static struct gfs_configuration gfs_configurations[] = {
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200121#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200122 {
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100123 .eth = bind_rndis_config,
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200124 },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200125#endif
126
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200127#ifdef CONFIG_USB_FUNCTIONFS_ETH
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200128 {
129 .eth = eth_bind_config,
130 },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200131#endif
132
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200133#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200134 {
135 },
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200136#endif
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200137};
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200138
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100139static void *functionfs_acquire_dev(struct ffs_dev *dev);
140static void functionfs_release_dev(struct ffs_dev *dev);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100141static int functionfs_ready_callback(struct ffs_data *ffs);
142static void functionfs_closed_callback(struct ffs_data *ffs);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200143static int gfs_bind(struct usb_composite_dev *cdev);
144static int gfs_unbind(struct usb_composite_dev *cdev);
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200145static int gfs_do_config(struct usb_configuration *c);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200146
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100147
Arnd Bergmannc94e2892015-04-11 00:14:21 +0200148static struct usb_composite_driver gfs_driver = {
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200149 .name = DRIVER_NAME,
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200150 .dev = &gfs_dev_desc,
151 .strings = gfs_dev_strings,
Tatyana Brokhman35a0e0b2011-06-29 16:41:49 +0300152 .max_speed = USB_SPEED_HIGH,
Sebastian Andrzej Siewior03e42bd2012-09-06 20:11:04 +0200153 .bind = gfs_bind,
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200154 .unbind = gfs_unbind,
155};
156
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200157static unsigned int missing_funcs;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200158static bool gfs_registered;
159static bool gfs_single_func;
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100160static struct usb_function_instance **fi_ffs;
161static struct usb_function **f_ffs[] = {
162#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
163 NULL,
164#endif
165
166#ifdef CONFIG_USB_FUNCTIONFS_ETH
167 NULL,
168#endif
169
170#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
171 NULL,
172#endif
173};
174
175#define N_CONF ARRAY_SIZE(f_ffs)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200176
Andrzej Pietrasiewicz8545e602012-03-12 12:55:42 +0100177static int __init gfs_init(void)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200178{
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100179 struct f_fs_opts *opts;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200180 int i;
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100181 int ret = 0;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200182
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200183 ENTER();
184
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100185 if (func_num < 2) {
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200186 gfs_single_func = true;
187 func_num = 1;
188 }
189
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100190 /*
191 * Allocate in one chunk for easier maintenance
192 */
193 f_ffs[0] = kcalloc(func_num * N_CONF, sizeof(*f_ffs), GFP_KERNEL);
194 if (!f_ffs[0]) {
195 ret = -ENOMEM;
196 goto no_func;
197 }
198 for (i = 1; i < N_CONF; ++i)
199 f_ffs[i] = f_ffs[0] + i * func_num;
200
201 fi_ffs = kcalloc(func_num, sizeof(*fi_ffs), GFP_KERNEL);
202 if (!fi_ffs) {
203 ret = -ENOMEM;
204 goto no_func;
205 }
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200206
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100207 for (i = 0; i < func_num; i++) {
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100208 fi_ffs[i] = usb_get_function_instance("ffs");
209 if (IS_ERR(fi_ffs[i])) {
210 ret = PTR_ERR(fi_ffs[i]);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100211 --i;
212 goto no_dev;
213 }
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100214 opts = to_f_fs_opts(fi_ffs[i]);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100215 if (gfs_single_func)
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100216 ret = ffs_single_dev(opts->dev);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100217 else
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100218 ret = ffs_name_dev(opts->dev, func_names[i]);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100219 if (ret)
220 goto no_dev;
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100221 opts->dev->ffs_ready_callback = functionfs_ready_callback;
222 opts->dev->ffs_closed_callback = functionfs_closed_callback;
223 opts->dev->ffs_acquire_dev_callback = functionfs_acquire_dev;
224 opts->dev->ffs_release_dev_callback = functionfs_release_dev;
225 opts->no_configfs = true;
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100226 }
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200227
228 missing_funcs = func_num;
229
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100230 return 0;
231no_dev:
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100232 while (i >= 0)
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100233 usb_put_function_instance(fi_ffs[i--]);
234 kfree(fi_ffs);
235no_func:
236 kfree(f_ffs[0]);
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100237 return ret;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200238}
239module_init(gfs_init);
240
Andrzej Pietrasiewicz8545e602012-03-12 12:55:42 +0100241static void __exit gfs_exit(void)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200242{
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100243 int i;
244
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200245 ENTER();
246
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200247 if (gfs_registered)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200248 usb_composite_unregister(&gfs_driver);
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200249 gfs_registered = false;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200250
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100251 kfree(f_ffs[0]);
252
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100253 for (i = 0; i < func_num; i++)
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100254 usb_put_function_instance(fi_ffs[i]);
255
256 kfree(fi_ffs);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200257}
258module_exit(gfs_exit);
259
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100260static void *functionfs_acquire_dev(struct ffs_dev *dev)
261{
262 if (!try_module_get(THIS_MODULE))
Krzysztof Opasiakd668b4f2014-05-21 14:05:35 +0200263 return ERR_PTR(-ENOENT);
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200264
Lad, Prabhakar2b87cd22015-02-05 13:11:47 +0000265 return NULL;
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100266}
267
268static void functionfs_release_dev(struct ffs_dev *dev)
269{
270 module_put(THIS_MODULE);
271}
272
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100273/*
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200274 * The caller of this function takes ffs_lock
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100275 */
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200276static int functionfs_ready_callback(struct ffs_data *ffs)
277{
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100278 int ret = 0;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200279
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100280 if (--missing_funcs)
281 return 0;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200282
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100283 if (gfs_registered)
284 return -EBUSY;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200285
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200286 gfs_registered = true;
287
Sebastian Andrzej Siewior03e42bd2012-09-06 20:11:04 +0200288 ret = usb_composite_probe(&gfs_driver);
Krzysztof Opasiakc41b33c2015-05-22 17:25:17 +0200289 if (unlikely(ret < 0)) {
290 ++missing_funcs;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200291 gfs_registered = false;
Krzysztof Opasiakc41b33c2015-05-22 17:25:17 +0200292 }
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200293
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200294 return ret;
295}
296
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100297/*
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200298 * The caller of this function takes ffs_lock
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100299 */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200300static void functionfs_closed_callback(struct ffs_data *ffs)
301{
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200302 missing_funcs++;
303
304 if (gfs_registered)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200305 usb_composite_unregister(&gfs_driver);
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200306 gfs_registered = false;
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200307}
308
309/*
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100310 * It is assumed that gfs_bind is called from a context where ffs_lock is held
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200311 */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200312static int gfs_bind(struct usb_composite_dev *cdev)
313{
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100314#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100315 struct net_device *net;
316#endif
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200317 int ret, i;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200318
319 ENTER();
320
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200321 if (missing_funcs)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200322 return -ENODEV;
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100323#if defined CONFIG_USB_FUNCTIONFS_ETH
324 if (can_support_ecm(cdev->gadget)) {
325 struct f_ecm_opts *ecm_opts;
326
327 fi_ecm = usb_get_function_instance("ecm");
328 if (IS_ERR(fi_ecm))
329 return PTR_ERR(fi_ecm);
330 ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100331 net = ecm_opts->net;
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100332 } else {
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100333 struct f_gether_opts *geth_opts;
334
335 fi_geth = usb_get_function_instance("geth");
336 if (IS_ERR(fi_geth))
337 return PTR_ERR(fi_geth);
338 geth_opts = container_of(fi_geth, struct f_gether_opts,
339 func_inst);
340 net = geth_opts->net;
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100341 }
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100342#endif
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100343
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100344#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
345 {
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100346 fi_rndis = usb_get_function_instance("rndis");
347 if (IS_ERR(fi_rndis)) {
348 ret = PTR_ERR(fi_rndis);
349 goto error;
350 }
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100351#ifndef CONFIG_USB_FUNCTIONFS_ETH
Michal Nazarewicz872ce512016-05-31 14:17:21 +0200352 net = container_of(fi_rndis, struct f_rndis_opts,
353 func_inst)->net;
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100354#endif
355 }
356#endif
357
358#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS
359 gether_set_qmult(net, qmult);
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100360 if (!gether_set_host_addr(net, host_addr))
361 pr_info("using host ethernet address: %s", host_addr);
362 if (!gether_set_dev_addr(net, dev_addr))
363 pr_info("using self ethernet address: %s", dev_addr);
Sebastian Andrzej Siewiord6a01432012-12-23 21:10:12 +0100364#endif
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100365
366#if defined CONFIG_USB_FUNCTIONFS_RNDIS && defined CONFIG_USB_FUNCTIONFS_ETH
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100367 gether_set_gadget(net, cdev->gadget);
368 ret = gether_register_netdev(net);
369 if (ret)
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100370 goto error_rndis;
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100371
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100372 if (can_support_ecm(cdev->gadget)) {
373 struct f_ecm_opts *ecm_opts;
374
375 ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100376 ecm_opts->bound = true;
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100377 } else {
378 struct f_gether_opts *geth_opts;
379
380 geth_opts = container_of(fi_geth, struct f_gether_opts,
381 func_inst);
382 geth_opts->bound = true;
Sebastian Andrzej Siewiord6a01432012-12-23 21:10:12 +0100383 }
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100384
385 rndis_borrow_net(fi_rndis, net);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100386#endif
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200387
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100388 /* TODO: gstrings_attach? */
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200389 ret = usb_string_ids_tab(cdev, gfs_strings);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200390 if (unlikely(ret < 0))
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100391 goto error_rndis;
Sebastian Andrzej Siewiord33f74f2012-09-10 15:01:57 +0200392 gfs_dev_desc.iProduct = gfs_strings[USB_GADGET_PRODUCT_IDX].id;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200393
Li Jun75c93102015-07-09 15:18:53 +0800394 if (gadget_is_otg(cdev->gadget) && !gfs_otg_desc[0]) {
395 struct usb_descriptor_header *usb_desc;
396
397 usb_desc = usb_otg_descriptor_alloc(cdev->gadget);
398 if (!usb_desc)
399 goto error_rndis;
400 usb_otg_descriptor_init(cdev->gadget, usb_desc);
401 gfs_otg_desc[0] = usb_desc;
402 gfs_otg_desc[1] = NULL;
403 }
404
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200405 for (i = 0; i < ARRAY_SIZE(gfs_configurations); ++i) {
406 struct gfs_configuration *c = gfs_configurations + i;
Sebastian Andrzej Siewior276e2e42012-09-06 20:11:21 +0200407 int sid = USB_GADGET_FIRST_AVAIL_IDX + i;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200408
Sebastian Andrzej Siewior276e2e42012-09-06 20:11:21 +0200409 c->c.label = gfs_strings[sid].s;
410 c->c.iConfiguration = gfs_strings[sid].id;
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200411 c->c.bConfigurationValue = 1 + i;
412 c->c.bmAttributes = USB_CONFIG_ATT_SELFPOWER;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200413
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100414 c->num = i;
415
Uwe Kleine-Königc9bfff92010-08-12 17:43:55 +0200416 ret = usb_add_config(cdev, &c->c, gfs_do_config);
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200417 if (unlikely(ret < 0))
418 goto error_unbind;
419 }
Sebastian Andrzej Siewior7d16e8d2012-09-10 15:01:53 +0200420 usb_composite_overwrite_options(cdev, &coverwrite);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200421 return 0;
422
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100423/* TODO */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200424error_unbind:
Li Jun75c93102015-07-09 15:18:53 +0800425 kfree(gfs_otg_desc[0]);
426 gfs_otg_desc[0] = NULL;
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100427error_rndis:
428#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
429 usb_put_function_instance(fi_rndis);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200430error:
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100431#endif
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100432#if defined CONFIG_USB_FUNCTIONFS_ETH
433 if (can_support_ecm(cdev->gadget))
434 usb_put_function_instance(fi_ecm);
435 else
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100436 usb_put_function_instance(fi_geth);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100437#endif
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200438 return ret;
439}
440
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200441/*
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100442 * It is assumed that gfs_unbind is called from a context where ffs_lock is held
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200443 */
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200444static int gfs_unbind(struct usb_composite_dev *cdev)
445{
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200446 int i;
447
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200448 ENTER();
449
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100450
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100451#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
452 usb_put_function(f_rndis);
453 usb_put_function_instance(fi_rndis);
454#endif
455
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100456#if defined CONFIG_USB_FUNCTIONFS_ETH
457 if (can_support_ecm(cdev->gadget)) {
458 usb_put_function(f_ecm);
459 usb_put_function_instance(fi_ecm);
460 } else {
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100461 usb_put_function(f_geth);
462 usb_put_function_instance(fi_geth);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100463 }
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100464#endif
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100465 for (i = 0; i < N_CONF * func_num; ++i)
466 usb_put_function(*(f_ffs[0] + i));
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200467
Li Jun75c93102015-07-09 15:18:53 +0800468 kfree(gfs_otg_desc[0]);
469 gfs_otg_desc[0] = NULL;
470
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200471 return 0;
472}
473
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200474/*
475 * It is assumed that gfs_do_config is called from a context where
Andrzej Pietrasiewicz4b187fc2013-12-03 15:15:32 +0100476 * ffs_lock is held
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200477 */
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200478static int gfs_do_config(struct usb_configuration *c)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200479{
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200480 struct gfs_configuration *gc =
481 container_of(c, struct gfs_configuration, c);
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200482 int i;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200483 int ret;
484
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200485 if (missing_funcs)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200486 return -ENODEV;
487
488 if (gadget_is_otg(c->cdev->gadget)) {
489 c->descriptors = gfs_otg_desc;
490 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
491 }
492
Michal Nazarewiczf8dae532010-06-25 16:29:27 +0200493 if (gc->eth) {
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100494 ret = gc->eth(c);
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200495 if (unlikely(ret < 0))
496 return ret;
497 }
498
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200499 for (i = 0; i < func_num; i++) {
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100500 f_ffs[gc->num][i] = usb_get_function(fi_ffs[i]);
501 if (IS_ERR(f_ffs[gc->num][i])) {
502 ret = PTR_ERR(f_ffs[gc->num][i]);
503 goto error;
504 }
505 ret = usb_add_function(c, f_ffs[gc->num][i]);
506 if (ret < 0) {
507 usb_put_function(f_ffs[gc->num][i]);
508 goto error;
509 }
Andrzej Pietrasiewicz581791f2012-05-14 15:51:52 +0200510 }
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200511
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200512 /*
513 * After previous do_configs there may be some invalid
Michal Nazarewiczf588c0d2010-06-14 10:43:34 +0200514 * pointers in c->interface array. This happens every time
515 * a user space function with fewer interfaces than a user
516 * space function that was run before the new one is run. The
517 * compasit's set_config() assumes that if there is no more
518 * then MAX_CONFIG_INTERFACES interfaces in a configuration
519 * then there is a NULL pointer after the last interface in
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200520 * c->interface array. We need to make sure this is true.
521 */
Michal Nazarewiczf588c0d2010-06-14 10:43:34 +0200522 if (c->next_interface_id < ARRAY_SIZE(c->interface))
523 c->interface[c->next_interface_id] = NULL;
524
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200525 return 0;
Andrzej Pietrasiewicz6f823cd2013-12-03 15:15:34 +0100526error:
527 while (--i >= 0) {
528 if (!IS_ERR(f_ffs[gc->num][i]))
529 usb_remove_function(c, f_ffs[gc->num][i]);
530 usb_put_function(f_ffs[gc->num][i]);
531 }
532 return ret;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200533}
534
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200535#ifdef CONFIG_USB_FUNCTIONFS_ETH
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200536
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100537static int eth_bind_config(struct usb_configuration *c)
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200538{
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100539 int status = 0;
540
541 if (can_support_ecm(c->cdev->gadget)) {
542 f_ecm = usb_get_function(fi_ecm);
543 if (IS_ERR(f_ecm))
544 return PTR_ERR(f_ecm);
545
546 status = usb_add_function(c, f_ecm);
547 if (status < 0)
548 usb_put_function(f_ecm);
549
550 } else {
Andrzej Pietrasiewicz85aec592013-12-03 15:15:25 +0100551 f_geth = usb_get_function(fi_geth);
552 if (IS_ERR(f_geth))
553 return PTR_ERR(f_geth);
554
555 status = usb_add_function(c, f_geth);
556 if (status < 0)
557 usb_put_function(f_geth);
Andrzej Pietrasiewiczf212ad42013-12-03 15:15:23 +0100558 }
559 return status;
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200560}
Michal Nazarewiczfc19de62010-08-12 17:43:48 +0200561
Michal Nazarewiczc6c56002010-05-05 12:53:15 +0200562#endif
Andrzej Pietrasiewicz6e257b12013-12-03 15:15:27 +0100563
564#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
565
566static int bind_rndis_config(struct usb_configuration *c)
567{
568 int status = 0;
569
570 f_rndis = usb_get_function(fi_rndis);
571 if (IS_ERR(f_rndis))
572 return PTR_ERR(f_rndis);
573
574 status = usb_add_function(c, f_rndis);
575 if (status < 0)
576 usb_put_function(f_rndis);
577
578 return status;
579}
580
581#endif