[net-next-2.6.git] / drivers / usb / gadget / g_ffs.c

#include <linux/module.h>
#include <linux/utsname.h>


/*
 * kbuild is not very cooperative with respect to linking separately
 * compiled library objects into one module.  So for now we won't use
 * separate compilation ... ensuring init/exit sections work to shrink
 * the runtime footprint, and giving us at least some parts of what
 * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
 */

#include "composite.c"
#include "usbstring.c"
#include "config.c"
#include "epautoconf.c"

#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS
#  if defined USB_ETH_RNDIS
#    undef USB_ETH_RNDIS
#  endif
#  ifdef CONFIG_USB_FUNCTIONFS_RNDIS
#    define USB_ETH_RNDIS y
#  endif

#  include "f_ecm.c"
#  include "f_subset.c"
#  ifdef USB_ETH_RNDIS
#    include "f_rndis.c"
#    include "rndis.c"
#  endif
#  include "u_ether.c"

static u8 gfs_hostaddr[ETH_ALEN];
#  ifdef CONFIG_USB_FUNCTIONFS_ETH
static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
#  endif
#else
#  define gether_cleanup() do { } while (0)
#  define gether_setup(gadget, hostaddr)   ((int)0)
#  define gfs_hostaddr NULL
#endif

#include "f_fs.c"


#define DRIVER_NAME	"g_ffs"
#define DRIVER_DESC	"USB Function Filesystem"
#define DRIVER_VERSION	"24 Aug 2004"

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Michal Nazarewicz");
MODULE_LICENSE("GPL");


static unsigned short gfs_vendor_id    = 0x1d6b;	/* Linux Foundation */
static unsigned short gfs_product_id   = 0x0105;	/* FunctionFS Gadget */

static struct usb_device_descriptor gfs_dev_desc = {
	.bLength		= sizeof gfs_dev_desc,
	.bDescriptorType	= USB_DT_DEVICE,

	.bcdUSB			= cpu_to_le16(0x0200),
	.bDeviceClass		= USB_CLASS_PER_INTERFACE,

	/* Vendor and product id can be overridden by module parameters.  */
	/* .idVendor		= cpu_to_le16(gfs_vendor_id), */
	/* .idProduct		= cpu_to_le16(gfs_product_id), */
	/* .bcdDevice		= f(hardware) */
	/* .iManufacturer	= DYNAMIC */
	/* .iProduct		= DYNAMIC */
	/* NO SERIAL NUMBER */
	.bNumConfigurations	= 1,
};

#define GFS_MODULE_PARAM_DESC(name, field) \
	MODULE_PARM_DESC(name, "Value of the " #field " field of the device descriptor sent to the host.  Takes effect only prior to the user-space driver registering to the FunctionFS.")

module_param_named(usb_class,    gfs_dev_desc.bDeviceClass,    byte,   0644);
GFS_MODULE_PARAM_DESC(usb_class, bDeviceClass);
module_param_named(usb_subclass, gfs_dev_desc.bDeviceSubClass, byte,   0644);
GFS_MODULE_PARAM_DESC(usb_subclass, bDeviceSubClass);
module_param_named(usb_protocol, gfs_dev_desc.bDeviceProtocol, byte,   0644);
GFS_MODULE_PARAM_DESC(usb_protocol, bDeviceProtocol);
module_param_named(usb_vendor,   gfs_vendor_id,                ushort, 0644);
GFS_MODULE_PARAM_DESC(usb_vendor, idVendor);
module_param_named(usb_product,  gfs_product_id,               ushort, 0644);
GFS_MODULE_PARAM_DESC(usb_product, idProduct);


static const struct usb_descriptor_header *gfs_otg_desc[] = {
	(const struct usb_descriptor_header *)
	&(const struct usb_otg_descriptor) {
		.bLength		= sizeof(struct usb_otg_descriptor),
		.bDescriptorType	= USB_DT_OTG,

		/* REVISIT SRP-only hardware is possible, although
		 * it would not be called "OTG" ... */
		.bmAttributes		= USB_OTG_SRP | USB_OTG_HNP,
	},

	NULL
};

/* string IDs are assigned dynamically */

enum {
	GFS_STRING_MANUFACTURER_IDX,
	GFS_STRING_PRODUCT_IDX,
	GFS_STRING_FIRST_CONFIG_IDX,
};

static       char gfs_manufacturer[50];
static const char gfs_driver_desc[] = DRIVER_DESC;
static const char gfs_short_name[]  = DRIVER_NAME;

static struct usb_string gfs_strings[] = {
	[GFS_STRING_MANUFACTURER_IDX].s = gfs_manufacturer,
	[GFS_STRING_PRODUCT_IDX].s = gfs_driver_desc,
#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
	{ .s = "FunctionFS + RNDIS" },
#endif
#ifdef CONFIG_USB_FUNCTIONFS_ETH
	{ .s = "FunctionFS + ECM" },
#endif
#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
	{ .s = "FunctionFS" },
#endif
	{  } /* end of list */
};

static struct usb_gadget_strings *gfs_dev_strings[] = {
	&(struct usb_gadget_strings) {
		.language	= 0x0409,	/* en-us */
		.strings	= gfs_strings,
	},
	NULL,
};


struct gfs_configuration {
	struct usb_configuration c;
	int (*eth)(struct usb_configuration *c, u8 *ethaddr);
} gfs_configurations[] = {
#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
	{
		.eth		= rndis_bind_config,
	},
#endif

#ifdef CONFIG_USB_FUNCTIONFS_ETH
	{
		.eth		= eth_bind_config,
	},
#endif

#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
	{
	},
#endif
};


static int gfs_bind(struct usb_composite_dev *cdev);
static int gfs_unbind(struct usb_composite_dev *cdev);
static int gfs_do_config(struct usb_configuration *c);

static struct usb_composite_driver gfs_driver = {
	.name		= gfs_short_name,
	.dev		= &gfs_dev_desc,
	.strings	= gfs_dev_strings,
	.bind		= gfs_bind,
	.unbind		= gfs_unbind,
};


static struct ffs_data *gfs_ffs_data;
static unsigned long gfs_registered;


static int  gfs_init(void)
{
	ENTER();

	return functionfs_init();
}
module_init(gfs_init);

static void  gfs_exit(void)
{
	ENTER();

	if (test_and_clear_bit(0, &gfs_registered))
		usb_composite_unregister(&gfs_driver);

	functionfs_cleanup();
}
module_exit(gfs_exit);


static int functionfs_ready_callback(struct ffs_data *ffs)
{
	int ret;

	ENTER();

	if (WARN_ON(test_and_set_bit(0, &gfs_registered)))
		return -EBUSY;

	gfs_ffs_data = ffs;
	ret = usb_composite_register(&gfs_driver);
	if (unlikely(ret < 0))
		clear_bit(0, &gfs_registered);
	return ret;
}

static void functionfs_closed_callback(struct ffs_data *ffs)
{
	ENTER();

	if (test_and_clear_bit(0, &gfs_registered))
		usb_composite_unregister(&gfs_driver);
}


static int functionfs_check_dev_callback(const char *dev_name)
{
	return 0;
}


static int gfs_bind(struct usb_composite_dev *cdev)
{
	int ret, i;

	ENTER();

	if (WARN_ON(!gfs_ffs_data))
		return -ENODEV;

	ret = gether_setup(cdev->gadget, gfs_hostaddr);
	if (unlikely(ret < 0))
		goto error_quick;

	gfs_dev_desc.idVendor  = cpu_to_le16(gfs_vendor_id);
	gfs_dev_desc.idProduct = cpu_to_le16(gfs_product_id);

	snprintf(gfs_manufacturer, sizeof gfs_manufacturer, "%s %s with %s",
		 init_utsname()->sysname, init_utsname()->release,
		 cdev->gadget->name);

	ret = usb_string_ids_tab(cdev, gfs_strings);
	if (unlikely(ret < 0))
		goto error;

	gfs_dev_desc.iManufacturer = gfs_strings[GFS_STRING_MANUFACTURER_IDX].id;
	gfs_dev_desc.iProduct      = gfs_strings[GFS_STRING_PRODUCT_IDX].id;

	ret = functionfs_bind(gfs_ffs_data, cdev);
	if (unlikely(ret < 0))
		goto error;

	for (i = 0; i < ARRAY_SIZE(gfs_configurations); ++i) {
		struct gfs_configuration *c = gfs_configurations + i;

		ret = GFS_STRING_FIRST_CONFIG_IDX + i;
		c->c.label			= gfs_strings[ret].s;
		c->c.iConfiguration		= gfs_strings[ret].id;
		c->c.bind			= gfs_do_config;
		c->c.bConfigurationValue	= 1 + i;
		c->c.bmAttributes		= USB_CONFIG_ATT_SELFPOWER;

		ret = usb_add_config(cdev, &c->c);
		if (unlikely(ret < 0))
			goto error_unbind;
	}

	return 0;

error_unbind:
	functionfs_unbind(gfs_ffs_data);
error:
	gether_cleanup();
error_quick:
	gfs_ffs_data = NULL;
	return ret;
}

static int gfs_unbind(struct usb_composite_dev *cdev)
{
	ENTER();

	/* We may have been called in an error recovery frem
	 * composite_bind() after gfs_unbind() failure so we need to
	 * check if gfs_ffs_data is not NULL since gfs_bind() handles
	 * all error recovery itself.  I'd rather we werent called
	 * from composite on orror recovery, but what you're gonna
	 * do...? */

	if (gfs_ffs_data) {
		gether_cleanup();
		functionfs_unbind(gfs_ffs_data);
		gfs_ffs_data = NULL;
	}

	return 0;
}


static int gfs_do_config(struct usb_configuration *c)
{
	struct gfs_configuration *gc =
		container_of(c, struct gfs_configuration, c);
	int ret;

	if (WARN_ON(!gfs_ffs_data))
		return -ENODEV;

	if (gadget_is_otg(c->cdev->gadget)) {
		c->descriptors = gfs_otg_desc;
		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
	}

	if (gc->eth) {
		ret = gc->eth(c, gfs_hostaddr);
		if (unlikely(ret < 0))
			return ret;
	}

	ret = functionfs_bind_config(c->cdev, c, gfs_ffs_data);
	if (unlikely(ret < 0))
		return ret;

	/* After previous do_configs there may be some invalid
	 * pointers in c->interface array.  This happens every time
	 * a user space function with fewer interfaces than a user
	 * space function that was run before the new one is run.  The
	 * compasit's set_config() assumes that if there is no more
	 * then MAX_CONFIG_INTERFACES interfaces in a configuration
	 * then there is a NULL pointer after the last interface in
	 * c->interface array.  We need to make sure this is true. */
	if (c->next_interface_id < ARRAY_SIZE(c->interface))
		c->interface[c->next_interface_id] = NULL;

	return 0;
}


#ifdef CONFIG_USB_FUNCTIONFS_ETH
static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN])
{
	return can_support_ecm(c->cdev->gadget)
		? ecm_bind_config(c, ethaddr)
		: geth_bind_config(c, ethaddr);
}
#endif
Commit	Line	Data
c6c56008 MN	1	#include <linux/module.h>
	2	#include <linux/utsname.h>
	3
	4
	5	/*
	6	* kbuild is not very cooperative with respect to linking separately
	7	* compiled library objects into one module. So for now we won't use
	8	* separate compilation ... ensuring init/exit sections work to shrink
	9	* the runtime footprint, and giving us at least some parts of what
	10	* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
	11	*/
	12
	13	#include "composite.c"
	14	#include "usbstring.c"
	15	#include "config.c"
	16	#include "epautoconf.c"
	17
	18	#if defined CONFIG_USB_FUNCTIONFS_ETH \|\| defined CONFIG_USB_FUNCTIONFS_RNDIS
	19	# if defined USB_ETH_RNDIS
	20	# undef USB_ETH_RNDIS
	21	# endif
	22	# ifdef CONFIG_USB_FUNCTIONFS_RNDIS
	23	# define USB_ETH_RNDIS y
	24	# endif
	25
	26	# include "f_ecm.c"
	27	# include "f_subset.c"
	28	# ifdef USB_ETH_RNDIS
	29	# include "f_rndis.c"
	30	# include "rndis.c"
	31	# endif
	32	# include "u_ether.c"
	33
	34	static u8 gfs_hostaddr[ETH_ALEN];
f8dae531 MN	35	# ifdef CONFIG_USB_FUNCTIONFS_ETH
f8dae531 MN	36	static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
c6c56008	37	# endif
f8dae531	38	#else
c6c56008 MN	39	# define gether_cleanup() do { } while (0)
c6c56008 MN	40	# define gether_setup(gadget, hostaddr) ((int)0)
f8dae531	41	# define gfs_hostaddr NULL
c6c56008 MN	42	#endif
	43
	44	#include "f_fs.c"
	45
	46
	47	#define DRIVER_NAME "g_ffs"
	48	#define DRIVER_DESC "USB Function Filesystem"
	49	#define DRIVER_VERSION "24 Aug 2004"
	50
	51	MODULE_DESCRIPTION(DRIVER_DESC);
	52	MODULE_AUTHOR("Michal Nazarewicz");
	53	MODULE_LICENSE("GPL");
	54
	55
ba0534be MN	56	static unsigned short gfs_vendor_id = 0x1d6b; /* Linux Foundation */
ba0534be MN	57	static unsigned short gfs_product_id = 0x0105; /* FunctionFS Gadget */
c6c56008 MN	58
	59	static struct usb_device_descriptor gfs_dev_desc = {
	60	.bLength = sizeof gfs_dev_desc,
	61	.bDescriptorType = USB_DT_DEVICE,
	62
	63	.bcdUSB = cpu_to_le16(0x0200),
	64	.bDeviceClass = USB_CLASS_PER_INTERFACE,
	65
	66	/* Vendor and product id can be overridden by module parameters. */
	67	/* .idVendor = cpu_to_le16(gfs_vendor_id), */
	68	/* .idProduct = cpu_to_le16(gfs_product_id), */
	69	/* .bcdDevice = f(hardware) */
	70	/* .iManufacturer = DYNAMIC */
	71	/* .iProduct = DYNAMIC */
	72	/* NO SERIAL NUMBER */
	73	.bNumConfigurations = 1,
	74	};
	75
	76	#define GFS_MODULE_PARAM_DESC(name, field) \
	77	MODULE_PARM_DESC(name, "Value of the " #field " field of the device descriptor sent to the host. Takes effect only prior to the user-space driver registering to the FunctionFS.")
	78
	79	module_param_named(usb_class, gfs_dev_desc.bDeviceClass, byte, 0644);
	80	GFS_MODULE_PARAM_DESC(usb_class, bDeviceClass);
	81	module_param_named(usb_subclass, gfs_dev_desc.bDeviceSubClass, byte, 0644);
	82	GFS_MODULE_PARAM_DESC(usb_subclass, bDeviceSubClass);
	83	module_param_named(usb_protocol, gfs_dev_desc.bDeviceProtocol, byte, 0644);
	84	GFS_MODULE_PARAM_DESC(usb_protocol, bDeviceProtocol);
	85	module_param_named(usb_vendor, gfs_vendor_id, ushort, 0644);
	86	GFS_MODULE_PARAM_DESC(usb_vendor, idVendor);
	87	module_param_named(usb_product, gfs_product_id, ushort, 0644);
	88	GFS_MODULE_PARAM_DESC(usb_product, idProduct);
	89
	90
	91
	92	static const struct usb_descriptor_header *gfs_otg_desc[] = {
	93	(const struct usb_descriptor_header *)
	94	&(const struct usb_otg_descriptor) {
	95	.bLength = sizeof(struct usb_otg_descriptor),
	96	.bDescriptorType = USB_DT_OTG,
	97
	98	/* REVISIT SRP-only hardware is possible, although
	99	* it would not be called "OTG" ... */
	100	.bmAttributes = USB_OTG_SRP \| USB_OTG_HNP,
	101	},
	102
	103	NULL
	104	};
	105
	106	/* string IDs are assigned dynamically */
	107
	108	enum {
	109	GFS_STRING_MANUFACTURER_IDX,
	110	GFS_STRING_PRODUCT_IDX,
f8dae531	111	GFS_STRING_FIRST_CONFIG_IDX,
c6c56008 MN	112	};
	113
	114	static char gfs_manufacturer[50];
	115	static const char gfs_driver_desc[] = DRIVER_DESC;
	116	static const char gfs_short_name[] = DRIVER_NAME;
	117
	118	static struct usb_string gfs_strings[] = {
	119	[GFS_STRING_MANUFACTURER_IDX].s = gfs_manufacturer,
	120	[GFS_STRING_PRODUCT_IDX].s = gfs_driver_desc,
	121	#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
f8dae531	122	{ .s = "FunctionFS + RNDIS" },
c6c56008 MN	123	#endif
c6c56008 MN	124	#ifdef CONFIG_USB_FUNCTIONFS_ETH
f8dae531	125	{ .s = "FunctionFS + ECM" },
c6c56008 MN	126	#endif
c6c56008 MN	127	#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
f8dae531	128	{ .s = "FunctionFS" },
c6c56008 MN	129	#endif
	130	{ } /* end of list */
	131	};
	132
	133	static struct usb_gadget_strings *gfs_dev_strings[] = {
	134	&(struct usb_gadget_strings) {
	135	.language = 0x0409, /* en-us */
	136	.strings = gfs_strings,
	137	},
	138	NULL,
	139	};
	140
	141
f8dae531 MN	142
	143	struct gfs_configuration {
	144	struct usb_configuration c;
	145	int (eth)(struct usb_configuration c, u8 *ethaddr);
	146	} gfs_configurations[] = {
c6c56008	147	#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
f8dae531 MN	148	{
	149	.eth = rndis_bind_config,
	150	},
c6c56008 MN	151	#endif
c6c56008 MN	152
c6c56008	153	#ifdef CONFIG_USB_FUNCTIONFS_ETH
f8dae531 MN	154	{
	155	.eth = eth_bind_config,
	156	},
c6c56008 MN	157	#endif
c6c56008 MN	158
c6c56008	159	#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
f8dae531 MN	160	{
f8dae531 MN	161	},
c6c56008	162	#endif
f8dae531	163	};
c6c56008 MN	164
	165
	166	static int gfs_bind(struct usb_composite_dev *cdev);
	167	static int gfs_unbind(struct usb_composite_dev *cdev);
f8dae531	168	static int gfs_do_config(struct usb_configuration *c);
c6c56008 MN	169
	170	static struct usb_composite_driver gfs_driver = {
	171	.name = gfs_short_name,
	172	.dev = &gfs_dev_desc,
	173	.strings = gfs_dev_strings,
	174	.bind = gfs_bind,
	175	.unbind = gfs_unbind,
	176	};
	177
	178
	179	static struct ffs_data *gfs_ffs_data;
	180	static unsigned long gfs_registered;
	181
	182
	183	static int gfs_init(void)
	184	{
	185	ENTER();
	186
	187	return functionfs_init();
	188	}
	189	module_init(gfs_init);
	190
	191	static void gfs_exit(void)
	192	{
	193	ENTER();
	194
	195	if (test_and_clear_bit(0, &gfs_registered))
	196	usb_composite_unregister(&gfs_driver);
	197
	198	functionfs_cleanup();
	199	}
	200	module_exit(gfs_exit);
	201
	202
	203	static int functionfs_ready_callback(struct ffs_data *ffs)
	204	{
	205	int ret;
	206
	207	ENTER();
	208
	209	if (WARN_ON(test_and_set_bit(0, &gfs_registered)))
	210	return -EBUSY;
	211
	212	gfs_ffs_data = ffs;
	213	ret = usb_composite_register(&gfs_driver);
	214	if (unlikely(ret < 0))
	215	clear_bit(0, &gfs_registered);
	216	return ret;
	217	}
	218
	219	static void functionfs_closed_callback(struct ffs_data *ffs)
	220	{
	221	ENTER();
	222
	223	if (test_and_clear_bit(0, &gfs_registered))
	224	usb_composite_unregister(&gfs_driver);
	225	}
	226
	227
	228	static int functionfs_check_dev_callback(const char *dev_name)
	229	{
	230	return 0;
	231	}
	232
233
234
235	static int gfs_bind(struct usb_composite_dev *cdev)
236	{
f8dae531	237	int ret, i;
c6c56008 MN	238
	239	ENTER();
	240
	241	if (WARN_ON(!gfs_ffs_data))
	242	return -ENODEV;
	243
	244	ret = gether_setup(cdev->gadget, gfs_hostaddr);
	245	if (unlikely(ret < 0))
	246	goto error_quick;
	247
	248	gfs_dev_desc.idVendor = cpu_to_le16(gfs_vendor_id);
	249	gfs_dev_desc.idProduct = cpu_to_le16(gfs_product_id);
	250
	251	snprintf(gfs_manufacturer, sizeof gfs_manufacturer, "%s %s with %s",
	252	init_utsname()->sysname, init_utsname()->release,
	253	cdev->gadget->name);
c6c56008	254
f8dae531	255	ret = usb_string_ids_tab(cdev, gfs_strings);
c6c56008 MN	256	if (unlikely(ret < 0))
c6c56008 MN	257	goto error;
c6c56008	258
f8dae531 MN	259	gfs_dev_desc.iManufacturer = gfs_strings[GFS_STRING_MANUFACTURER_IDX].id;
f8dae531 MN	260	gfs_dev_desc.iProduct = gfs_strings[GFS_STRING_PRODUCT_IDX].id;
c6c56008 MN	261
	262	ret = functionfs_bind(gfs_ffs_data, cdev);
	263	if (unlikely(ret < 0))
	264	goto error;
	265
f8dae531 MN	266	for (i = 0; i < ARRAY_SIZE(gfs_configurations); ++i) {
f8dae531 MN	267	struct gfs_configuration *c = gfs_configurations + i;
c6c56008	268
f8dae531 MN	269	ret = GFS_STRING_FIRST_CONFIG_IDX + i;
	270	c->c.label = gfs_strings[ret].s;
	271	c->c.iConfiguration = gfs_strings[ret].id;
	272	c->c.bind = gfs_do_config;
	273	c->c.bConfigurationValue = 1 + i;
	274	c->c.bmAttributes = USB_CONFIG_ATT_SELFPOWER;
c6c56008	275
f8dae531 MN	276	ret = usb_add_config(cdev, &c->c);
	277	if (unlikely(ret < 0))
	278	goto error_unbind;
	279	}
c6c56008 MN	280
	281	return 0;
	282
	283	error_unbind:
	284	functionfs_unbind(gfs_ffs_data);
	285	error:
	286	gether_cleanup();
	287	error_quick:
	288	gfs_ffs_data = NULL;
	289	return ret;
	290	}
	291
	292	static int gfs_unbind(struct usb_composite_dev *cdev)
	293	{
	294	ENTER();
	295
	296	/* We may have been called in an error recovery frem
	297	* composite_bind() after gfs_unbind() failure so we need to
	298	* check if gfs_ffs_data is not NULL since gfs_bind() handles
	299	* all error recovery itself. I'd rather we werent called
	300	* from composite on orror recovery, but what you're gonna
	301	* do...? */
	302
	303	if (gfs_ffs_data) {
	304	gether_cleanup();
	305	functionfs_unbind(gfs_ffs_data);
	306	gfs_ffs_data = NULL;
	307	}
	308
	309	return 0;
	310	}
	311
	312
f8dae531	313	static int gfs_do_config(struct usb_configuration *c)
c6c56008	314	{
f8dae531 MN	315	struct gfs_configuration *gc =
f8dae531 MN	316	container_of(c, struct gfs_configuration, c);
c6c56008 MN	317	int ret;
	318
	319	if (WARN_ON(!gfs_ffs_data))
	320	return -ENODEV;
	321
	322	if (gadget_is_otg(c->cdev->gadget)) {
	323	c->descriptors = gfs_otg_desc;
	324	c->bmAttributes \|= USB_CONFIG_ATT_WAKEUP;
	325	}
	326
f8dae531 MN	327	if (gc->eth) {
f8dae531 MN	328	ret = gc->eth(c, gfs_hostaddr);
c6c56008 MN	329	if (unlikely(ret < 0))
	330	return ret;
	331	}
	332
7898aee1	333	ret = functionfs_bind_config(c->cdev, c, gfs_ffs_data);
c6c56008 MN	334	if (unlikely(ret < 0))
	335	return ret;
	336
f588c0db MN	337	/* After previous do_configs there may be some invalid
	338	* pointers in c->interface array. This happens every time
	339	* a user space function with fewer interfaces than a user
	340	* space function that was run before the new one is run. The
	341	* compasit's set_config() assumes that if there is no more
	342	* then MAX_CONFIG_INTERFACES interfaces in a configuration
	343	* then there is a NULL pointer after the last interface in
	344	* c->interface array. We need to make sure this is true. */
	345	if (c->next_interface_id < ARRAY_SIZE(c->interface))
	346	c->interface[c->next_interface_id] = NULL;
	347
c6c56008 MN	348	return 0;
	349	}
	350
c6c56008 MN	351
c6c56008 MN	352	#ifdef CONFIG_USB_FUNCTIONFS_ETH
f8dae531	353	static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN])
c6c56008	354	{
f8dae531 MN	355	return can_support_ecm(c->cdev->gadget)
	356	? ecm_bind_config(c, ethaddr)
	357	: geth_bind_config(c, ethaddr);
c6c56008 MN	358	}
c6c56008 MN	359	#endif