[mirror_ubuntu-jammy-kernel.git] / drivers / usb / gadget / legacy / multi.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * 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
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0+
f176a5d8 MN	2	/*
	3	* multi.c -- Multifunction Composite driver
	4	*
	5	* Copyright (C) 2008 David Brownell
	6	* Copyright (C) 2008 Nokia Corporation
	7	* Copyright (C) 2009 Samsung Electronics
54b8360f	8	* Author: Michal Nazarewicz (mina86@mina86.com)
f176a5d8 MN	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
f176a5d8 MN	14	*/
	15
	16
	17	#include <linux/kernel.h>
279cc49a	18	#include <linux/module.h>
73889015	19	#include <linux/netdevice.h>
f176a5d8	20
59835ad7	21	#include "u_serial.h"
396cda90 MN	22	#if defined USB_ETH_RNDIS
	23	# undef USB_ETH_RNDIS
	24	#endif
dbe4a99d	25	#ifdef CONFIG_USB_G_MULTI_RNDIS
396cda90	26	# define USB_ETH_RNDIS y
f176a5d8 MN	27	#endif
	28
	29
	30	#define DRIVER_DESC "Multifunction Composite Gadget"
f176a5d8	31
279cc49a MN	32	MODULE_DESCRIPTION(DRIVER_DESC);
	33	MODULE_AUTHOR("Michal Nazarewicz");
	34	MODULE_LICENSE("GPL");
f176a5d8	35
f176a5d8	36
1bcce939	37	#include "f_mass_storage.h"
f176a5d8	38
73889015	39	#include "u_ecm.h"
396cda90	40	#ifdef USB_ETH_RNDIS
4d1a8f68	41	# include "u_rndis.h"
cbbd14a9	42	# include "rndis.h"
f176a5d8	43	#endif
f1a1823f	44	#include "u_ether.h"
f176a5d8	45
7d16e8d3	46	USB_GADGET_COMPOSITE_OPTIONS();
279cc49a	47
f1a1823f AP	48	USB_ETHERNET_MODULE_PARAMETERS();
f1a1823f AP	49
279cc49a MN	50	/*************************** Device Descriptor **************************/
279cc49a MN	51
1c6529e9 MN	52	#define MULTI_VENDOR_NUM 0x1d6b /* Linux Foundation */
1c6529e9 MN	53	#define MULTI_PRODUCT_NUM 0x0104 /* Multifunction Composite Gadget */
279cc49a MN	54
	55
	56	enum {
	57	__MULTI_NO_CONFIG,
	58	#ifdef CONFIG_USB_G_MULTI_RNDIS
	59	MULTI_RNDIS_CONFIG_NUM,
	60	#endif
	61	#ifdef CONFIG_USB_G_MULTI_CDC
	62	MULTI_CDC_CONFIG_NUM,
	63	#endif
	64	};
	65
f176a5d8 MN	66
	67	static struct usb_device_descriptor device_desc = {
	68	.bLength = sizeof device_desc,
	69	.bDescriptorType = USB_DT_DEVICE,
	70
0aecfc1b	71	/* .bcdUSB = DYNAMIC */
f176a5d8	72
279cc49a	73	.bDeviceClass = USB_CLASS_MISC /* 0xEF */,
f176a5d8 MN	74	.bDeviceSubClass = 2,
f176a5d8 MN	75	.bDeviceProtocol = 1,
f176a5d8 MN	76
	77	/* Vendor and product id can be overridden by module parameters. */
	78	.idVendor = cpu_to_le16(MULTI_VENDOR_NUM),
	79	.idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
f176a5d8 MN	80	};
f176a5d8 MN	81
21ddc2a8	82	static const struct usb_descriptor_header *otg_desc[2];
f176a5d8	83
279cc49a	84	enum {
276e2e4f	85	MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX,
279cc49a	86	MULTI_STRING_CDC_CONFIG_IDX,
279cc49a	87	};
f176a5d8	88
f176a5d8	89	static struct usb_string strings_dev[] = {
276e2e4f	90	[USB_GADGET_MANUFACTURER_IDX].s = "",
d33f74fc	91	[USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
276e2e4f	92	[USB_GADGET_SERIAL_IDX].s = "",
279cc49a	93	[MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
279cc49a	94	[MULTI_STRING_CDC_CONFIG_IDX].s = "Multifunction with CDC ECM",
f176a5d8 MN	95	{ } /* end of list */
	96	};
	97
f176a5d8	98	static struct usb_gadget_strings *dev_strings[] = {
279cc49a MN	99	&(struct usb_gadget_strings){
	100	.language = 0x0409, /* en-us */
	101	.strings = strings_dev,
	102	},
f176a5d8 MN	103	NULL,
	104	};
	105
f176a5d8 MN	106
	107
	108
	109	/**************************** Configurations ****************************/
	110
279cc49a	111	static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
6fdc5dd2 AP	112	#ifdef CONFIG_USB_GADGET_DEBUG_FILES
	113
	114	static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
	115
	116	#else
	117
	118	/*
	119	* Number of buffers we will use.
	120	* 2 is usually enough for good buffering pipeline
	121	*/
	122	#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
	123
0c8b1992	124	#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
6fdc5dd2	125
279cc49a MN	126	FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
279cc49a MN	127
59835ad7	128	static struct usb_function_instance *fi_acm;
1bcce939	129	static struct usb_function_instance *fi_msg;
f176a5d8	130
279cc49a	131	/******** RNDIS ********/
f176a5d8	132
396cda90	133	#ifdef USB_ETH_RNDIS
4d1a8f68	134	static struct usb_function_instance *fi_rndis;
59835ad7	135	static struct usb_function *f_acm_rndis;
4d1a8f68	136	static struct usb_function *f_rndis;
1bcce939	137	static struct usb_function *f_msg_rndis;
f176a5d8	138
c94e289f	139	static int rndis_do_config(struct usb_configuration *c)
f176a5d8 MN	140	{
	141	int ret;
	142
	143	if (gadget_is_otg(c->cdev->gadget)) {
	144	c->descriptors = otg_desc;
	145	c->bmAttributes \|= USB_CONFIG_ATT_WAKEUP;
	146	}
	147
4d1a8f68 AP	148	f_rndis = usb_get_function(fi_rndis);
	149	if (IS_ERR(f_rndis))
	150	return PTR_ERR(f_rndis);
	151
	152	ret = usb_add_function(c, f_rndis);
f176a5d8	153	if (ret < 0)
4d1a8f68	154	goto err_func_rndis;
f176a5d8	155
59835ad7	156	f_acm_rndis = usb_get_function(fi_acm);
4d1a8f68 AP	157	if (IS_ERR(f_acm_rndis)) {
	158	ret = PTR_ERR(f_acm_rndis);
	159	goto err_func_acm;
	160	}
59835ad7 SAS	161
	162	ret = usb_add_function(c, f_acm_rndis);
	163	if (ret)
	164	goto err_conf;
f176a5d8	165
1bcce939 AP	166	f_msg_rndis = usb_get_function(fi_msg);
	167	if (IS_ERR(f_msg_rndis)) {
	168	ret = PTR_ERR(f_msg_rndis);
59835ad7	169	goto err_fsg;
1bcce939 AP	170	}
1bcce939 AP	171
1bcce939 AP	172	ret = usb_add_function(c, f_msg_rndis);
	173	if (ret)
	174	goto err_run;
f176a5d8 MN	175
f176a5d8 MN	176	return 0;
1bcce939 AP	177	err_run:
1bcce939 AP	178	usb_put_function(f_msg_rndis);
59835ad7 SAS	179	err_fsg:
	180	usb_remove_function(c, f_acm_rndis);
	181	err_conf:
	182	usb_put_function(f_acm_rndis);
4d1a8f68 AP	183	err_func_acm:
	184	usb_remove_function(c, f_rndis);
	185	err_func_rndis:
	186	usb_put_function(f_rndis);
59835ad7	187	return ret;
f176a5d8 MN	188	}
f176a5d8 MN	189
780cc0f3	190	static __ref int rndis_config_register(struct usb_composite_dev *cdev)
279cc49a MN	191	{
279cc49a MN	192	static struct usb_configuration config = {
279cc49a MN	193	.bConfigurationValue = MULTI_RNDIS_CONFIG_NUM,
	194	.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
	195	};
	196
	197	config.label = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
	198	config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;
	199
c9bfff9c	200	return usb_add_config(cdev, &config, rndis_do_config);
279cc49a MN	201	}
	202
	203	#else
	204
780cc0f3	205	static __ref int rndis_config_register(struct usb_composite_dev *cdev)
279cc49a MN	206	{
	207	return 0;
	208	}
f176a5d8 MN	209
	210	#endif
	211
279cc49a MN	212
	213	/******** CDC ECM ********/
	214
f176a5d8	215	#ifdef CONFIG_USB_G_MULTI_CDC
73889015	216	static struct usb_function_instance *fi_ecm;
59835ad7	217	static struct usb_function *f_acm_multi;
73889015	218	static struct usb_function *f_ecm;
1bcce939	219	static struct usb_function *f_msg_multi;
f176a5d8	220
c94e289f	221	static int cdc_do_config(struct usb_configuration *c)
f176a5d8 MN	222	{
	223	int ret;
	224
	225	if (gadget_is_otg(c->cdev->gadget)) {
	226	c->descriptors = otg_desc;
	227	c->bmAttributes \|= USB_CONFIG_ATT_WAKEUP;
	228	}
	229
73889015 AP	230	f_ecm = usb_get_function(fi_ecm);
	231	if (IS_ERR(f_ecm))
	232	return PTR_ERR(f_ecm);
	233
	234	ret = usb_add_function(c, f_ecm);
f176a5d8	235	if (ret < 0)
73889015	236	goto err_func_ecm;
f176a5d8	237
59835ad7 SAS	238	/* implicit port_num is zero */
59835ad7 SAS	239	f_acm_multi = usb_get_function(fi_acm);
73889015 AP	240	if (IS_ERR(f_acm_multi)) {
	241	ret = PTR_ERR(f_acm_multi);
	242	goto err_func_acm;
	243	}
59835ad7 SAS	244
	245	ret = usb_add_function(c, f_acm_multi);
	246	if (ret)
	247	goto err_conf;
f176a5d8	248
1bcce939 AP	249	f_msg_multi = usb_get_function(fi_msg);
	250	if (IS_ERR(f_msg_multi)) {
	251	ret = PTR_ERR(f_msg_multi);
59835ad7	252	goto err_fsg;
1bcce939 AP	253	}
1bcce939 AP	254
1bcce939 AP	255	ret = usb_add_function(c, f_msg_multi);
	256	if (ret)
	257	goto err_run;
f176a5d8 MN	258
f176a5d8 MN	259	return 0;
1bcce939 AP	260	err_run:
1bcce939 AP	261	usb_put_function(f_msg_multi);
59835ad7 SAS	262	err_fsg:
	263	usb_remove_function(c, f_acm_multi);
	264	err_conf:
	265	usb_put_function(f_acm_multi);
73889015 AP	266	err_func_acm:
	267	usb_remove_function(c, f_ecm);
	268	err_func_ecm:
	269	usb_put_function(f_ecm);
59835ad7	270	return ret;
f176a5d8 MN	271	}
f176a5d8 MN	272
780cc0f3	273	static __ref int cdc_config_register(struct usb_composite_dev *cdev)
279cc49a MN	274	{
279cc49a MN	275	static struct usb_configuration config = {
279cc49a MN	276	.bConfigurationValue = MULTI_CDC_CONFIG_NUM,
	277	.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
	278	};
	279
	280	config.label = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
	281	config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;
	282
c9bfff9c	283	return usb_add_config(cdev, &config, cdc_do_config);
279cc49a MN	284	}
	285
	286	#else
	287
780cc0f3	288	static __ref int cdc_config_register(struct usb_composite_dev *cdev)
279cc49a MN	289	{
	290	return 0;
	291	}
f176a5d8 MN	292
	293	#endif
	294
	295
	296
	297	/**************************** Gadget Bind ****************************/
	298
279cc49a	299	static int __ref multi_bind(struct usb_composite_dev *cdev)
f176a5d8 MN	300	{
f176a5d8 MN	301	struct usb_gadget *gadget = cdev->gadget;
73889015 AP	302	#ifdef CONFIG_USB_G_MULTI_CDC
73889015 AP	303	struct f_ecm_opts *ecm_opts;
4d1a8f68 AP	304	#endif
	305	#ifdef USB_ETH_RNDIS
	306	struct f_rndis_opts *rndis_opts;
73889015	307	#endif
1bcce939 AP	308	struct fsg_opts *fsg_opts;
1bcce939 AP	309	struct fsg_config config;
ed9cbda6	310	int status;
f176a5d8 MN	311
	312	if (!can_support_ecm(cdev->gadget)) {
	313	dev_err(&gadget->dev, "controller '%s' not usable\n",
4d1a8f68	314	gadget->name);
f176a5d8 MN	315	return -EINVAL;
	316	}
	317
73889015 AP	318	#ifdef CONFIG_USB_G_MULTI_CDC
	319	fi_ecm = usb_get_function_instance("ecm");
	320	if (IS_ERR(fi_ecm))
	321	return PTR_ERR(fi_ecm);
	322
	323	ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
	324
	325	gether_set_qmult(ecm_opts->net, qmult);
	326	if (!gether_set_host_addr(ecm_opts->net, host_addr))
	327	pr_info("using host ethernet address: %s", host_addr);
	328	if (!gether_set_dev_addr(ecm_opts->net, dev_addr))
	329	pr_info("using self ethernet address: %s", dev_addr);
4d1a8f68	330	#endif
73889015	331
4d1a8f68 AP	332	#ifdef USB_ETH_RNDIS
	333	fi_rndis = usb_get_function_instance("rndis");
	334	if (IS_ERR(fi_rndis)) {
	335	status = PTR_ERR(fi_rndis);
	336	goto fail;
	337	}
73889015	338
4d1a8f68	339	rndis_opts = container_of(fi_rndis, struct f_rndis_opts, func_inst);
73889015	340
4d1a8f68 AP	341	gether_set_qmult(rndis_opts->net, qmult);
	342	if (!gether_set_host_addr(rndis_opts->net, host_addr))
	343	pr_info("using host ethernet address: %s", host_addr);
	344	if (!gether_set_dev_addr(rndis_opts->net, dev_addr))
	345	pr_info("using self ethernet address: %s", dev_addr);
73889015 AP	346	#endif
	347
	348	#if (defined CONFIG_USB_G_MULTI_CDC && defined USB_ETH_RNDIS)
4d1a8f68 AP	349	/*
	350	* If both ecm and rndis are selected then:
	351	* 1) rndis borrows the net interface from ecm
	352	* 2) since the interface is shared it must not be bound
	353	* twice - in ecm's _and_ rndis' binds, so do it here.
	354	*/
73889015 AP	355	gether_set_gadget(ecm_opts->net, cdev->gadget);
	356	status = gether_register_netdev(ecm_opts->net);
	357	if (status)
	358	goto fail0;
73889015	359
4d1a8f68 AP	360	rndis_borrow_net(fi_rndis, ecm_opts->net);
4d1a8f68 AP	361	ecm_opts->bound = true;
73889015	362	#endif
f176a5d8 MN	363
f176a5d8 MN	364	/* set up serial link layer */
59835ad7 SAS	365	fi_acm = usb_get_function_instance("acm");
	366	if (IS_ERR(fi_acm)) {
	367	status = PTR_ERR(fi_acm);
c4ed4ac1	368	goto fail0;
59835ad7 SAS	369	}
59835ad7 SAS	370
f176a5d8	371	/* set up mass storage function */
1bcce939 AP	372	fi_msg = usb_get_function_instance("mass_storage");
	373	if (IS_ERR(fi_msg)) {
	374	status = PTR_ERR(fi_msg);
	375	goto fail1;
f176a5d8	376	}
1bcce939 AP	377	fsg_config_from_params(&config, &fsg_mod_data, fsg_num_buffers);
	378	fsg_opts = fsg_opts_from_func_inst(fi_msg);
	379
	380	fsg_opts->no_configfs = true;
	381	status = fsg_common_set_num_buffers(fsg_opts->common, fsg_num_buffers);
	382	if (status)
	383	goto fail2;
	384
1bcce939 AP	385	status = fsg_common_set_cdev(fsg_opts->common, cdev, config.can_stall);
	386	if (status)
	387	goto fail_set_cdev;
	388
	389	fsg_common_set_sysfs(fsg_opts->common, true);
	390	status = fsg_common_create_luns(fsg_opts->common, &config);
	391	if (status)
	392	goto fail_set_cdev;
	393
	394	fsg_common_set_inquiry_string(fsg_opts->common, config.vendor_name,
	395	config.product_name);
f176a5d8	396
a99d8a45	397	/* allocate string IDs */
279cc49a MN	398	status = usb_string_ids_tab(cdev, strings_dev);
279cc49a MN	399	if (unlikely(status < 0))
1bcce939	400	goto fail_string_ids;
d33f74fc	401	device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
f176a5d8	402
21ddc2a8 LJ	403	if (gadget_is_otg(gadget) && !otg_desc[0]) {
	404	struct usb_descriptor_header *usb_desc;
	405
	406	usb_desc = usb_otg_descriptor_alloc(gadget);
	407	if (!usb_desc)
	408	goto fail_string_ids;
	409	usb_otg_descriptor_init(gadget, usb_desc);
	410	otg_desc[0] = usb_desc;
	411	otg_desc[1] = NULL;
	412	}
	413
279cc49a MN	414	/* register configurations */
	415	status = rndis_config_register(cdev);
	416	if (unlikely(status < 0))
21ddc2a8	417	goto fail_otg_desc;
f176a5d8	418
279cc49a MN	419	status = cdc_config_register(cdev);
279cc49a MN	420	if (unlikely(status < 0))
21ddc2a8	421	goto fail_otg_desc;
7d16e8d3	422	usb_composite_overwrite_options(cdev, &coverwrite);
f176a5d8	423
279cc49a MN	424	/* we're done */
279cc49a MN	425	dev_info(&gadget->dev, DRIVER_DESC "\n");
f176a5d8 MN	426	return 0;
f176a5d8 MN	427
279cc49a MN	428
279cc49a MN	429	/* error recovery */
21ddc2a8 LJ	430	fail_otg_desc:
	431	kfree(otg_desc[0]);
	432	otg_desc[0] = NULL;
1bcce939 AP	433	fail_string_ids:
	434	fsg_common_remove_luns(fsg_opts->common);
	435	fail_set_cdev:
1bcce939	436	fsg_common_free_buffers(fsg_opts->common);
f176a5d8	437	fail2:
1bcce939	438	usb_put_function_instance(fi_msg);
f176a5d8	439	fail1:
59835ad7	440	usb_put_function_instance(fi_acm);
f176a5d8	441	fail0:
4d1a8f68 AP	442	#ifdef USB_ETH_RNDIS
	443	usb_put_function_instance(fi_rndis);
	444	fail:
	445	#endif
73889015 AP	446	#ifdef CONFIG_USB_G_MULTI_CDC
73889015 AP	447	usb_put_function_instance(fi_ecm);
73889015	448	#endif
f176a5d8 MN	449	return status;
	450	}
	451
c94e289f	452	static int multi_unbind(struct usb_composite_dev *cdev)
f176a5d8	453	{
1bcce939 AP	454	#ifdef CONFIG_USB_G_MULTI_CDC
	455	usb_put_function(f_msg_multi);
	456	#endif
	457	#ifdef USB_ETH_RNDIS
	458	usb_put_function(f_msg_rndis);
	459	#endif
	460	usb_put_function_instance(fi_msg);
59835ad7 SAS	461	#ifdef CONFIG_USB_G_MULTI_CDC
	462	usb_put_function(f_acm_multi);
	463	#endif
	464	#ifdef USB_ETH_RNDIS
	465	usb_put_function(f_acm_rndis);
	466	#endif
	467	usb_put_function_instance(fi_acm);
4d1a8f68 AP	468	#ifdef USB_ETH_RNDIS
	469	usb_put_function(f_rndis);
	470	usb_put_function_instance(fi_rndis);
	471	#endif
73889015 AP	472	#ifdef CONFIG_USB_G_MULTI_CDC
	473	usb_put_function(f_ecm);
	474	usb_put_function_instance(fi_ecm);
73889015	475	#endif
21ddc2a8 LJ	476	kfree(otg_desc[0]);
	477	otg_desc[0] = NULL;
	478
f176a5d8 MN	479	return 0;
	480	}
	481
	482
	483	/**************************** Some noise ****************************/
	484
	485
c94e289f	486	static struct usb_composite_driver multi_driver = {
f176a5d8 MN	487	.name = "g_multi",
	488	.dev = &device_desc,
	489	.strings = dev_strings,
35a0e0bf	490	.max_speed = USB_SPEED_HIGH,
03e42bd5	491	.bind = multi_bind,
c94e289f	492	.unbind = multi_unbind,
a99d8a45	493	.needs_serial = 1,
f176a5d8 MN	494	};
f176a5d8 MN	495
909346a8	496	module_usb_composite_driver(multi_driver);