[deliverable/linux.git] / drivers / usb / gadget / legacy / multi.c

/*
 * multi.c -- Multifunction Composite driver
 *
 * Copyright (C) 2008 David Brownell
 * Copyright (C) 2008 Nokia Corporation
 * Copyright (C) 2009 Samsung Electronics
 * Author: Michal Nazarewicz (mina86@mina86.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>

#include "u_serial.h"
#if defined USB_ETH_RNDIS
#  undef USB_ETH_RNDIS
#endif
#ifdef CONFIG_USB_G_MULTI_RNDIS
#  define USB_ETH_RNDIS y
#endif


#define DRIVER_DESC		"Multifunction Composite Gadget"

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


#include "f_mass_storage.h"

#include "u_ecm.h"
#ifdef USB_ETH_RNDIS
#  include "u_rndis.h"
#  include "rndis.h"
#endif
#include "u_ether.h"

USB_GADGET_COMPOSITE_OPTIONS();

USB_ETHERNET_MODULE_PARAMETERS();

/***************************** Device Descriptor ****************************/

#define MULTI_VENDOR_NUM	0x1d6b	/* Linux Foundation */
#define MULTI_PRODUCT_NUM	0x0104	/* Multifunction Composite Gadget */


enum {
	__MULTI_NO_CONFIG,
#ifdef CONFIG_USB_G_MULTI_RNDIS
	MULTI_RNDIS_CONFIG_NUM,
#endif
#ifdef CONFIG_USB_G_MULTI_CDC
	MULTI_CDC_CONFIG_NUM,
#endif
};


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

	/* .bcdUSB = DYNAMIC */

	.bDeviceClass =		USB_CLASS_MISC /* 0xEF */,
	.bDeviceSubClass =	2,
	.bDeviceProtocol =	1,

	/* Vendor and product id can be overridden by module parameters.  */
	.idVendor =		cpu_to_le16(MULTI_VENDOR_NUM),
	.idProduct =		cpu_to_le16(MULTI_PRODUCT_NUM),
};

static const struct usb_descriptor_header *otg_desc[2];

enum {
	MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX,
	MULTI_STRING_CDC_CONFIG_IDX,
};

static struct usb_string strings_dev[] = {
	[USB_GADGET_MANUFACTURER_IDX].s = "",
	[USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
	[USB_GADGET_SERIAL_IDX].s = "",
	[MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
	[MULTI_STRING_CDC_CONFIG_IDX].s   = "Multifunction with CDC ECM",
	{  } /* end of list */
};

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


/****************************** Configurations ******************************/

static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
#ifdef CONFIG_USB_GADGET_DEBUG_FILES

static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;

#else

/*
 * Number of buffers we will use.
 * 2 is usually enough for good buffering pipeline
 */
#define fsg_num_buffers	CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS

#endif /* CONFIG_USB_GADGET_DEBUG_FILES */

FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);

static struct usb_function_instance *fi_acm;
static struct usb_function_instance *fi_msg;

/********** RNDIS **********/

#ifdef USB_ETH_RNDIS
static struct usb_function_instance *fi_rndis;
static struct usb_function *f_acm_rndis;
static struct usb_function *f_rndis;
static struct usb_function *f_msg_rndis;

static int rndis_do_config(struct usb_configuration *c)
{
	int ret;

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

	f_rndis = usb_get_function(fi_rndis);
	if (IS_ERR(f_rndis))
		return PTR_ERR(f_rndis);

	ret = usb_add_function(c, f_rndis);
	if (ret < 0)
		goto err_func_rndis;

	f_acm_rndis = usb_get_function(fi_acm);
	if (IS_ERR(f_acm_rndis)) {
		ret = PTR_ERR(f_acm_rndis);
		goto err_func_acm;
	}

	ret = usb_add_function(c, f_acm_rndis);
	if (ret)
		goto err_conf;

	f_msg_rndis = usb_get_function(fi_msg);
	if (IS_ERR(f_msg_rndis)) {
		ret = PTR_ERR(f_msg_rndis);
		goto err_fsg;
	}

	ret = usb_add_function(c, f_msg_rndis);
	if (ret)
		goto err_run;

	return 0;
err_run:
	usb_put_function(f_msg_rndis);
err_fsg:
	usb_remove_function(c, f_acm_rndis);
err_conf:
	usb_put_function(f_acm_rndis);
err_func_acm:
	usb_remove_function(c, f_rndis);
err_func_rndis:
	usb_put_function(f_rndis);
	return ret;
}

static __ref int rndis_config_register(struct usb_composite_dev *cdev)
{
	static struct usb_configuration config = {
		.bConfigurationValue	= MULTI_RNDIS_CONFIG_NUM,
		.bmAttributes		= USB_CONFIG_ATT_SELFPOWER,
	};

	config.label          = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
	config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;

	return usb_add_config(cdev, &config, rndis_do_config);
}

#else

static __ref int rndis_config_register(struct usb_composite_dev *cdev)
{
	return 0;
}

#endif


/********** CDC ECM **********/

#ifdef CONFIG_USB_G_MULTI_CDC
static struct usb_function_instance *fi_ecm;
static struct usb_function *f_acm_multi;
static struct usb_function *f_ecm;
static struct usb_function *f_msg_multi;

static int cdc_do_config(struct usb_configuration *c)
{
	int ret;

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

	f_ecm = usb_get_function(fi_ecm);
	if (IS_ERR(f_ecm))
		return PTR_ERR(f_ecm);

	ret = usb_add_function(c, f_ecm);
	if (ret < 0)
		goto err_func_ecm;

	/* implicit port_num is zero */
	f_acm_multi = usb_get_function(fi_acm);
	if (IS_ERR(f_acm_multi)) {
		ret = PTR_ERR(f_acm_multi);
		goto err_func_acm;
	}

	ret = usb_add_function(c, f_acm_multi);
	if (ret)
		goto err_conf;

	f_msg_multi = usb_get_function(fi_msg);
	if (IS_ERR(f_msg_multi)) {
		ret = PTR_ERR(f_msg_multi);
		goto err_fsg;
	}

	ret = usb_add_function(c, f_msg_multi);
	if (ret)
		goto err_run;

	return 0;
err_run:
	usb_put_function(f_msg_multi);
err_fsg:
	usb_remove_function(c, f_acm_multi);
err_conf:
	usb_put_function(f_acm_multi);
err_func_acm:
	usb_remove_function(c, f_ecm);
err_func_ecm:
	usb_put_function(f_ecm);
	return ret;
}

static __ref int cdc_config_register(struct usb_composite_dev *cdev)
{
	static struct usb_configuration config = {
		.bConfigurationValue	= MULTI_CDC_CONFIG_NUM,
		.bmAttributes		= USB_CONFIG_ATT_SELFPOWER,
	};

	config.label          = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
	config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;

	return usb_add_config(cdev, &config, cdc_do_config);
}

#else

static __ref int cdc_config_register(struct usb_composite_dev *cdev)
{
	return 0;
}

#endif


/****************************** Gadget Bind ******************************/

static int __ref multi_bind(struct usb_composite_dev *cdev)
{
	struct usb_gadget *gadget = cdev->gadget;
#ifdef CONFIG_USB_G_MULTI_CDC
	struct f_ecm_opts *ecm_opts;
#endif
#ifdef USB_ETH_RNDIS
	struct f_rndis_opts *rndis_opts;
#endif
	struct fsg_opts *fsg_opts;
	struct fsg_config config;
	int status;

	if (!can_support_ecm(cdev->gadget)) {
		dev_err(&gadget->dev, "controller '%s' not usable\n",
			gadget->name);
		return -EINVAL;
	}

#ifdef CONFIG_USB_G_MULTI_CDC
	fi_ecm = usb_get_function_instance("ecm");
	if (IS_ERR(fi_ecm))
		return PTR_ERR(fi_ecm);

	ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);

	gether_set_qmult(ecm_opts->net, qmult);
	if (!gether_set_host_addr(ecm_opts->net, host_addr))
		pr_info("using host ethernet address: %s", host_addr);
	if (!gether_set_dev_addr(ecm_opts->net, dev_addr))
		pr_info("using self ethernet address: %s", dev_addr);
#endif

#ifdef USB_ETH_RNDIS
	fi_rndis = usb_get_function_instance("rndis");
	if (IS_ERR(fi_rndis)) {
		status = PTR_ERR(fi_rndis);
		goto fail;
	}

	rndis_opts = container_of(fi_rndis, struct f_rndis_opts, func_inst);

	gether_set_qmult(rndis_opts->net, qmult);
	if (!gether_set_host_addr(rndis_opts->net, host_addr))
		pr_info("using host ethernet address: %s", host_addr);
	if (!gether_set_dev_addr(rndis_opts->net, dev_addr))
		pr_info("using self ethernet address: %s", dev_addr);
#endif

#if (defined CONFIG_USB_G_MULTI_CDC && defined USB_ETH_RNDIS)
	/*
	 * If both ecm and rndis are selected then:
	 *	1) rndis borrows the net interface from ecm
	 *	2) since the interface is shared it must not be bound
	 *	twice - in ecm's _and_ rndis' binds, so do it here.
	 */
	gether_set_gadget(ecm_opts->net, cdev->gadget);
	status = gether_register_netdev(ecm_opts->net);
	if (status)
		goto fail0;

	rndis_borrow_net(fi_rndis, ecm_opts->net);
	ecm_opts->bound = true;
#endif

	/* set up serial link layer */
	fi_acm = usb_get_function_instance("acm");
	if (IS_ERR(fi_acm)) {
		status = PTR_ERR(fi_acm);
		goto fail0;
	}

	/* set up mass storage function */
	fi_msg = usb_get_function_instance("mass_storage");
	if (IS_ERR(fi_msg)) {
		status = PTR_ERR(fi_msg);
		goto fail1;
	}
	fsg_config_from_params(&config, &fsg_mod_data, fsg_num_buffers);
	fsg_opts = fsg_opts_from_func_inst(fi_msg);

	fsg_opts->no_configfs = true;
	status = fsg_common_set_num_buffers(fsg_opts->common, fsg_num_buffers);
	if (status)
		goto fail2;

	status = fsg_common_set_cdev(fsg_opts->common, cdev, config.can_stall);
	if (status)
		goto fail_set_cdev;

	fsg_common_set_sysfs(fsg_opts->common, true);
	status = fsg_common_create_luns(fsg_opts->common, &config);
	if (status)
		goto fail_set_cdev;

	fsg_common_set_inquiry_string(fsg_opts->common, config.vendor_name,
				      config.product_name);

	/* allocate string IDs */
	status = usb_string_ids_tab(cdev, strings_dev);
	if (unlikely(status < 0))
		goto fail_string_ids;
	device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;

	if (gadget_is_otg(gadget) && !otg_desc[0]) {
		struct usb_descriptor_header *usb_desc;

		usb_desc = usb_otg_descriptor_alloc(gadget);
		if (!usb_desc)
			goto fail_string_ids;
		usb_otg_descriptor_init(gadget, usb_desc);
		otg_desc[0] = usb_desc;
		otg_desc[1] = NULL;
	}

	/* register configurations */
	status = rndis_config_register(cdev);
	if (unlikely(status < 0))
		goto fail_otg_desc;

	status = cdc_config_register(cdev);
	if (unlikely(status < 0))
		goto fail_otg_desc;
	usb_composite_overwrite_options(cdev, &coverwrite);

	/* we're done */
	dev_info(&gadget->dev, DRIVER_DESC "\n");
	return 0;


	/* error recovery */
fail_otg_desc:
	kfree(otg_desc[0]);
	otg_desc[0] = NULL;
fail_string_ids:
	fsg_common_remove_luns(fsg_opts->common);
fail_set_cdev:
	fsg_common_free_buffers(fsg_opts->common);
fail2:
	usb_put_function_instance(fi_msg);
fail1:
	usb_put_function_instance(fi_acm);
fail0:
#ifdef USB_ETH_RNDIS
	usb_put_function_instance(fi_rndis);
fail:
#endif
#ifdef CONFIG_USB_G_MULTI_CDC
	usb_put_function_instance(fi_ecm);
#endif
	return status;
}

static int multi_unbind(struct usb_composite_dev *cdev)
{
#ifdef CONFIG_USB_G_MULTI_CDC
	usb_put_function(f_msg_multi);
#endif
#ifdef USB_ETH_RNDIS
	usb_put_function(f_msg_rndis);
#endif
	usb_put_function_instance(fi_msg);
#ifdef CONFIG_USB_G_MULTI_CDC
	usb_put_function(f_acm_multi);
#endif
#ifdef USB_ETH_RNDIS
	usb_put_function(f_acm_rndis);
#endif
	usb_put_function_instance(fi_acm);
#ifdef USB_ETH_RNDIS
	usb_put_function(f_rndis);
	usb_put_function_instance(fi_rndis);
#endif
#ifdef CONFIG_USB_G_MULTI_CDC
	usb_put_function(f_ecm);
	usb_put_function_instance(fi_ecm);
#endif
	kfree(otg_desc[0]);
	otg_desc[0] = NULL;

	return 0;
}


/****************************** Some noise ******************************/


static struct usb_composite_driver multi_driver = {
	.name		= "g_multi",
	.dev		= &device_desc,
	.strings	= dev_strings,
	.max_speed	= USB_SPEED_HIGH,
	.bind		= multi_bind,
	.unbind		= multi_unbind,
	.needs_serial	= 1,
};

module_usb_composite_driver(multi_driver);
Commit	Line	Data
f176a5d8 MN	1	/*
	2	* multi.c -- Multifunction Composite driver
	3	*
	4	* Copyright (C) 2008 David Brownell
	5	* Copyright (C) 2008 Nokia Corporation
	6	* Copyright (C) 2009 Samsung Electronics
54b8360f	7	* Author: Michal Nazarewicz (mina86@mina86.com)
f176a5d8 MN	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
f176a5d8 MN	13	*/
	14
	15
	16	#include <linux/kernel.h>
279cc49a	17	#include <linux/module.h>
73889015	18	#include <linux/netdevice.h>
f176a5d8	19
59835ad7	20	#include "u_serial.h"
396cda90 MN	21	#if defined USB_ETH_RNDIS
	22	# undef USB_ETH_RNDIS
	23	#endif
dbe4a99d	24	#ifdef CONFIG_USB_G_MULTI_RNDIS
396cda90	25	# define USB_ETH_RNDIS y
f176a5d8 MN	26	#endif
	27
	28
	29	#define DRIVER_DESC "Multifunction Composite Gadget"
f176a5d8	30
279cc49a MN	31	MODULE_DESCRIPTION(DRIVER_DESC);
	32	MODULE_AUTHOR("Michal Nazarewicz");
	33	MODULE_LICENSE("GPL");
f176a5d8	34
f176a5d8	35
1bcce939	36	#include "f_mass_storage.h"
f176a5d8	37
73889015	38	#include "u_ecm.h"
396cda90	39	#ifdef USB_ETH_RNDIS
4d1a8f68	40	# include "u_rndis.h"
cbbd14a9	41	# include "rndis.h"
f176a5d8	42	#endif
f1a1823f	43	#include "u_ether.h"
f176a5d8	44
7d16e8d3	45	USB_GADGET_COMPOSITE_OPTIONS();
279cc49a	46
f1a1823f AP	47	USB_ETHERNET_MODULE_PARAMETERS();
f1a1823f AP	48
279cc49a MN	49	/*************************** Device Descriptor **************************/
279cc49a MN	50
1c6529e9 MN	51	#define MULTI_VENDOR_NUM 0x1d6b /* Linux Foundation */
1c6529e9 MN	52	#define MULTI_PRODUCT_NUM 0x0104 /* Multifunction Composite Gadget */
279cc49a MN	53
	54
	55	enum {
	56	__MULTI_NO_CONFIG,
	57	#ifdef CONFIG_USB_G_MULTI_RNDIS
	58	MULTI_RNDIS_CONFIG_NUM,
	59	#endif
	60	#ifdef CONFIG_USB_G_MULTI_CDC
	61	MULTI_CDC_CONFIG_NUM,
	62	#endif
	63	};
	64
f176a5d8 MN	65
	66	static struct usb_device_descriptor device_desc = {
	67	.bLength = sizeof device_desc,
	68	.bDescriptorType = USB_DT_DEVICE,
	69
0aecfc1b	70	/* .bcdUSB = DYNAMIC */
f176a5d8	71
279cc49a	72	.bDeviceClass = USB_CLASS_MISC /* 0xEF */,
f176a5d8 MN	73	.bDeviceSubClass = 2,
f176a5d8 MN	74	.bDeviceProtocol = 1,
f176a5d8 MN	75
	76	/* Vendor and product id can be overridden by module parameters. */
	77	.idVendor = cpu_to_le16(MULTI_VENDOR_NUM),
	78	.idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
f176a5d8 MN	79	};
f176a5d8 MN	80
21ddc2a8	81	static const struct usb_descriptor_header *otg_desc[2];
f176a5d8	82
279cc49a	83	enum {
276e2e4f	84	MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX,
279cc49a	85	MULTI_STRING_CDC_CONFIG_IDX,
279cc49a	86	};
f176a5d8	87
f176a5d8	88	static struct usb_string strings_dev[] = {
276e2e4f	89	[USB_GADGET_MANUFACTURER_IDX].s = "",
d33f74fc	90	[USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
276e2e4f	91	[USB_GADGET_SERIAL_IDX].s = "",
279cc49a	92	[MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
279cc49a	93	[MULTI_STRING_CDC_CONFIG_IDX].s = "Multifunction with CDC ECM",
f176a5d8 MN	94	{ } /* end of list */
	95	};
	96
f176a5d8	97	static struct usb_gadget_strings *dev_strings[] = {
279cc49a MN	98	&(struct usb_gadget_strings){
	99	.language = 0x0409, /* en-us */
	100	.strings = strings_dev,
	101	},
f176a5d8 MN	102	NULL,
	103	};
	104
f176a5d8 MN	105
	106
	107
	108	/**************************** Configurations ****************************/
	109
279cc49a	110	static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
6fdc5dd2 AP	111	#ifdef CONFIG_USB_GADGET_DEBUG_FILES
	112
	113	static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
	114
	115	#else
	116
	117	/*
	118	* Number of buffers we will use.
	119	* 2 is usually enough for good buffering pipeline
	120	*/
	121	#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
	122
0c8b1992	123	#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
6fdc5dd2	124
279cc49a MN	125	FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
279cc49a MN	126
59835ad7	127	static struct usb_function_instance *fi_acm;
1bcce939	128	static struct usb_function_instance *fi_msg;
f176a5d8	129
279cc49a	130	/******** RNDIS ********/
f176a5d8	131
396cda90	132	#ifdef USB_ETH_RNDIS
4d1a8f68	133	static struct usb_function_instance *fi_rndis;
59835ad7	134	static struct usb_function *f_acm_rndis;
4d1a8f68	135	static struct usb_function *f_rndis;
1bcce939	136	static struct usb_function *f_msg_rndis;
f176a5d8	137
c94e289f	138	static int rndis_do_config(struct usb_configuration *c)
f176a5d8 MN	139	{
	140	int ret;
	141
	142	if (gadget_is_otg(c->cdev->gadget)) {
	143	c->descriptors = otg_desc;
	144	c->bmAttributes \|= USB_CONFIG_ATT_WAKEUP;
	145	}
	146
4d1a8f68 AP	147	f_rndis = usb_get_function(fi_rndis);
	148	if (IS_ERR(f_rndis))
	149	return PTR_ERR(f_rndis);
	150
	151	ret = usb_add_function(c, f_rndis);
f176a5d8	152	if (ret < 0)
4d1a8f68	153	goto err_func_rndis;
f176a5d8	154
59835ad7	155	f_acm_rndis = usb_get_function(fi_acm);
4d1a8f68 AP	156	if (IS_ERR(f_acm_rndis)) {
	157	ret = PTR_ERR(f_acm_rndis);
	158	goto err_func_acm;
	159	}
59835ad7 SAS	160
	161	ret = usb_add_function(c, f_acm_rndis);
	162	if (ret)
	163	goto err_conf;
f176a5d8	164
1bcce939 AP	165	f_msg_rndis = usb_get_function(fi_msg);
	166	if (IS_ERR(f_msg_rndis)) {
	167	ret = PTR_ERR(f_msg_rndis);
59835ad7	168	goto err_fsg;
1bcce939 AP	169	}
1bcce939 AP	170
1bcce939 AP	171	ret = usb_add_function(c, f_msg_rndis);
	172	if (ret)
	173	goto err_run;
f176a5d8 MN	174
f176a5d8 MN	175	return 0;
1bcce939 AP	176	err_run:
1bcce939 AP	177	usb_put_function(f_msg_rndis);
59835ad7 SAS	178	err_fsg:
	179	usb_remove_function(c, f_acm_rndis);
	180	err_conf:
	181	usb_put_function(f_acm_rndis);
4d1a8f68 AP	182	err_func_acm:
	183	usb_remove_function(c, f_rndis);
	184	err_func_rndis:
	185	usb_put_function(f_rndis);
59835ad7	186	return ret;
f176a5d8 MN	187	}
f176a5d8 MN	188
780cc0f3	189	static __ref int rndis_config_register(struct usb_composite_dev *cdev)
279cc49a MN	190	{
279cc49a MN	191	static struct usb_configuration config = {
279cc49a MN	192	.bConfigurationValue = MULTI_RNDIS_CONFIG_NUM,
	193	.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
	194	};
	195
	196	config.label = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
	197	config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;
	198
c9bfff9c	199	return usb_add_config(cdev, &config, rndis_do_config);
279cc49a MN	200	}
	201
	202	#else
	203
780cc0f3	204	static __ref int rndis_config_register(struct usb_composite_dev *cdev)
279cc49a MN	205	{
	206	return 0;
	207	}
f176a5d8 MN	208
	209	#endif
	210
279cc49a MN	211
	212	/******** CDC ECM ********/
	213
f176a5d8	214	#ifdef CONFIG_USB_G_MULTI_CDC
73889015	215	static struct usb_function_instance *fi_ecm;
59835ad7	216	static struct usb_function *f_acm_multi;
73889015	217	static struct usb_function *f_ecm;
1bcce939	218	static struct usb_function *f_msg_multi;
f176a5d8	219
c94e289f	220	static int cdc_do_config(struct usb_configuration *c)
f176a5d8 MN	221	{
	222	int ret;
	223
	224	if (gadget_is_otg(c->cdev->gadget)) {
	225	c->descriptors = otg_desc;
	226	c->bmAttributes \|= USB_CONFIG_ATT_WAKEUP;
	227	}
	228
73889015 AP	229	f_ecm = usb_get_function(fi_ecm);
	230	if (IS_ERR(f_ecm))
	231	return PTR_ERR(f_ecm);
	232
	233	ret = usb_add_function(c, f_ecm);
f176a5d8	234	if (ret < 0)
73889015	235	goto err_func_ecm;
f176a5d8	236
59835ad7 SAS	237	/* implicit port_num is zero */
59835ad7 SAS	238	f_acm_multi = usb_get_function(fi_acm);
73889015 AP	239	if (IS_ERR(f_acm_multi)) {
	240	ret = PTR_ERR(f_acm_multi);
	241	goto err_func_acm;
	242	}
59835ad7 SAS	243
	244	ret = usb_add_function(c, f_acm_multi);
	245	if (ret)
	246	goto err_conf;
f176a5d8	247
1bcce939 AP	248	f_msg_multi = usb_get_function(fi_msg);
	249	if (IS_ERR(f_msg_multi)) {
	250	ret = PTR_ERR(f_msg_multi);
59835ad7	251	goto err_fsg;
1bcce939 AP	252	}
1bcce939 AP	253
1bcce939 AP	254	ret = usb_add_function(c, f_msg_multi);
	255	if (ret)
	256	goto err_run;
f176a5d8 MN	257
f176a5d8 MN	258	return 0;
1bcce939 AP	259	err_run:
1bcce939 AP	260	usb_put_function(f_msg_multi);
59835ad7 SAS	261	err_fsg:
	262	usb_remove_function(c, f_acm_multi);
	263	err_conf:
	264	usb_put_function(f_acm_multi);
73889015 AP	265	err_func_acm:
	266	usb_remove_function(c, f_ecm);
	267	err_func_ecm:
	268	usb_put_function(f_ecm);
59835ad7	269	return ret;
f176a5d8 MN	270	}
f176a5d8 MN	271
780cc0f3	272	static __ref int cdc_config_register(struct usb_composite_dev *cdev)
279cc49a MN	273	{
279cc49a MN	274	static struct usb_configuration config = {
279cc49a MN	275	.bConfigurationValue = MULTI_CDC_CONFIG_NUM,
	276	.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
	277	};
	278
	279	config.label = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
	280	config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;
	281
c9bfff9c	282	return usb_add_config(cdev, &config, cdc_do_config);
279cc49a MN	283	}
	284
	285	#else
	286
780cc0f3	287	static __ref int cdc_config_register(struct usb_composite_dev *cdev)
279cc49a MN	288	{
	289	return 0;
	290	}
f176a5d8 MN	291
	292	#endif
	293
	294
	295
	296	/**************************** Gadget Bind ****************************/
	297
279cc49a	298	static int __ref multi_bind(struct usb_composite_dev *cdev)
f176a5d8 MN	299	{
f176a5d8 MN	300	struct usb_gadget *gadget = cdev->gadget;
73889015 AP	301	#ifdef CONFIG_USB_G_MULTI_CDC
73889015 AP	302	struct f_ecm_opts *ecm_opts;
4d1a8f68 AP	303	#endif
	304	#ifdef USB_ETH_RNDIS
	305	struct f_rndis_opts *rndis_opts;
73889015	306	#endif
1bcce939 AP	307	struct fsg_opts *fsg_opts;
1bcce939 AP	308	struct fsg_config config;
ed9cbda6	309	int status;
f176a5d8 MN	310
	311	if (!can_support_ecm(cdev->gadget)) {
	312	dev_err(&gadget->dev, "controller '%s' not usable\n",
4d1a8f68	313	gadget->name);
f176a5d8 MN	314	return -EINVAL;
	315	}
	316
73889015 AP	317	#ifdef CONFIG_USB_G_MULTI_CDC
	318	fi_ecm = usb_get_function_instance("ecm");
	319	if (IS_ERR(fi_ecm))
	320	return PTR_ERR(fi_ecm);
	321
	322	ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
	323
	324	gether_set_qmult(ecm_opts->net, qmult);
	325	if (!gether_set_host_addr(ecm_opts->net, host_addr))
	326	pr_info("using host ethernet address: %s", host_addr);
	327	if (!gether_set_dev_addr(ecm_opts->net, dev_addr))
	328	pr_info("using self ethernet address: %s", dev_addr);
4d1a8f68	329	#endif
73889015	330
4d1a8f68 AP	331	#ifdef USB_ETH_RNDIS
	332	fi_rndis = usb_get_function_instance("rndis");
	333	if (IS_ERR(fi_rndis)) {
	334	status = PTR_ERR(fi_rndis);
	335	goto fail;
	336	}
73889015	337
4d1a8f68	338	rndis_opts = container_of(fi_rndis, struct f_rndis_opts, func_inst);
73889015	339
4d1a8f68 AP	340	gether_set_qmult(rndis_opts->net, qmult);
	341	if (!gether_set_host_addr(rndis_opts->net, host_addr))
	342	pr_info("using host ethernet address: %s", host_addr);
	343	if (!gether_set_dev_addr(rndis_opts->net, dev_addr))
	344	pr_info("using self ethernet address: %s", dev_addr);
73889015 AP	345	#endif
	346
	347	#if (defined CONFIG_USB_G_MULTI_CDC && defined USB_ETH_RNDIS)
4d1a8f68 AP	348	/*
	349	* If both ecm and rndis are selected then:
	350	* 1) rndis borrows the net interface from ecm
	351	* 2) since the interface is shared it must not be bound
	352	* twice - in ecm's _and_ rndis' binds, so do it here.
	353	*/
73889015 AP	354	gether_set_gadget(ecm_opts->net, cdev->gadget);
	355	status = gether_register_netdev(ecm_opts->net);
	356	if (status)
	357	goto fail0;
73889015	358
4d1a8f68 AP	359	rndis_borrow_net(fi_rndis, ecm_opts->net);
4d1a8f68 AP	360	ecm_opts->bound = true;
73889015	361	#endif
f176a5d8 MN	362
f176a5d8 MN	363	/* set up serial link layer */
59835ad7 SAS	364	fi_acm = usb_get_function_instance("acm");
	365	if (IS_ERR(fi_acm)) {
	366	status = PTR_ERR(fi_acm);
c4ed4ac1	367	goto fail0;
59835ad7 SAS	368	}
59835ad7 SAS	369
f176a5d8	370	/* set up mass storage function */
1bcce939 AP	371	fi_msg = usb_get_function_instance("mass_storage");
	372	if (IS_ERR(fi_msg)) {
	373	status = PTR_ERR(fi_msg);
	374	goto fail1;
f176a5d8	375	}
1bcce939 AP	376	fsg_config_from_params(&config, &fsg_mod_data, fsg_num_buffers);
	377	fsg_opts = fsg_opts_from_func_inst(fi_msg);
	378
	379	fsg_opts->no_configfs = true;
	380	status = fsg_common_set_num_buffers(fsg_opts->common, fsg_num_buffers);
	381	if (status)
	382	goto fail2;
	383
1bcce939 AP	384	status = fsg_common_set_cdev(fsg_opts->common, cdev, config.can_stall);
	385	if (status)
	386	goto fail_set_cdev;
	387
	388	fsg_common_set_sysfs(fsg_opts->common, true);
	389	status = fsg_common_create_luns(fsg_opts->common, &config);
	390	if (status)
	391	goto fail_set_cdev;
	392
	393	fsg_common_set_inquiry_string(fsg_opts->common, config.vendor_name,
	394	config.product_name);
f176a5d8	395
a99d8a45	396	/* allocate string IDs */
279cc49a MN	397	status = usb_string_ids_tab(cdev, strings_dev);
279cc49a MN	398	if (unlikely(status < 0))
1bcce939	399	goto fail_string_ids;
d33f74fc	400	device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
f176a5d8	401
21ddc2a8 LJ	402	if (gadget_is_otg(gadget) && !otg_desc[0]) {
	403	struct usb_descriptor_header *usb_desc;
	404
	405	usb_desc = usb_otg_descriptor_alloc(gadget);
	406	if (!usb_desc)
	407	goto fail_string_ids;
	408	usb_otg_descriptor_init(gadget, usb_desc);
	409	otg_desc[0] = usb_desc;
	410	otg_desc[1] = NULL;
	411	}
	412
279cc49a MN	413	/* register configurations */
	414	status = rndis_config_register(cdev);
	415	if (unlikely(status < 0))
21ddc2a8	416	goto fail_otg_desc;
f176a5d8	417
279cc49a MN	418	status = cdc_config_register(cdev);
279cc49a MN	419	if (unlikely(status < 0))
21ddc2a8	420	goto fail_otg_desc;
7d16e8d3	421	usb_composite_overwrite_options(cdev, &coverwrite);
f176a5d8	422
279cc49a MN	423	/* we're done */
279cc49a MN	424	dev_info(&gadget->dev, DRIVER_DESC "\n");
f176a5d8 MN	425	return 0;
f176a5d8 MN	426
279cc49a MN	427
279cc49a MN	428	/* error recovery */
21ddc2a8 LJ	429	fail_otg_desc:
	430	kfree(otg_desc[0]);
	431	otg_desc[0] = NULL;
1bcce939 AP	432	fail_string_ids:
	433	fsg_common_remove_luns(fsg_opts->common);
	434	fail_set_cdev:
1bcce939	435	fsg_common_free_buffers(fsg_opts->common);
f176a5d8	436	fail2:
1bcce939	437	usb_put_function_instance(fi_msg);
f176a5d8	438	fail1:
59835ad7	439	usb_put_function_instance(fi_acm);
f176a5d8	440	fail0:
4d1a8f68 AP	441	#ifdef USB_ETH_RNDIS
	442	usb_put_function_instance(fi_rndis);
	443	fail:
	444	#endif
73889015 AP	445	#ifdef CONFIG_USB_G_MULTI_CDC
73889015 AP	446	usb_put_function_instance(fi_ecm);
73889015	447	#endif
f176a5d8 MN	448	return status;
	449	}
	450
c94e289f	451	static int multi_unbind(struct usb_composite_dev *cdev)
f176a5d8	452	{
1bcce939 AP	453	#ifdef CONFIG_USB_G_MULTI_CDC
	454	usb_put_function(f_msg_multi);
	455	#endif
	456	#ifdef USB_ETH_RNDIS
	457	usb_put_function(f_msg_rndis);
	458	#endif
	459	usb_put_function_instance(fi_msg);
59835ad7 SAS	460	#ifdef CONFIG_USB_G_MULTI_CDC
	461	usb_put_function(f_acm_multi);
	462	#endif
	463	#ifdef USB_ETH_RNDIS
	464	usb_put_function(f_acm_rndis);
	465	#endif
	466	usb_put_function_instance(fi_acm);
4d1a8f68 AP	467	#ifdef USB_ETH_RNDIS
	468	usb_put_function(f_rndis);
	469	usb_put_function_instance(fi_rndis);
	470	#endif
73889015 AP	471	#ifdef CONFIG_USB_G_MULTI_CDC
	472	usb_put_function(f_ecm);
	473	usb_put_function_instance(fi_ecm);
73889015	474	#endif
21ddc2a8 LJ	475	kfree(otg_desc[0]);
	476	otg_desc[0] = NULL;
	477
f176a5d8 MN	478	return 0;
	479	}
	480
	481
	482	/**************************** Some noise ****************************/
	483
	484
c94e289f	485	static struct usb_composite_driver multi_driver = {
f176a5d8 MN	486	.name = "g_multi",
	487	.dev = &device_desc,
	488	.strings = dev_strings,
35a0e0bf	489	.max_speed = USB_SPEED_HIGH,
03e42bd5	490	.bind = multi_bind,
c94e289f	491	.unbind = multi_unbind,
a99d8a45	492	.needs_serial = 1,
f176a5d8 MN	493	};
f176a5d8 MN	494
909346a8	495	module_usb_composite_driver(multi_driver);