[linux-2.6-block.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)
 */


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

#endif


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

static int 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) {
			status = -ENOMEM;
			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_SUPER,
	.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
	11
	12	#include <linux/kernel.h>
279cc49a	13	#include <linux/module.h>
73889015	14	#include <linux/netdevice.h>
f176a5d8	15
59835ad7	16	#include "u_serial.h"
396cda90 MN	17	#if defined USB_ETH_RNDIS
	18	# undef USB_ETH_RNDIS
	19	#endif
dbe4a99d	20	#ifdef CONFIG_USB_G_MULTI_RNDIS
396cda90	21	# define USB_ETH_RNDIS y
f176a5d8 MN	22	#endif
	23
	24
	25	#define DRIVER_DESC "Multifunction Composite Gadget"
f176a5d8	26
279cc49a MN	27	MODULE_DESCRIPTION(DRIVER_DESC);
	28	MODULE_AUTHOR("Michal Nazarewicz");
	29	MODULE_LICENSE("GPL");
f176a5d8	30
f176a5d8	31
1bcce939	32	#include "f_mass_storage.h"
f176a5d8	33
73889015	34	#include "u_ecm.h"
396cda90	35	#ifdef USB_ETH_RNDIS
4d1a8f68	36	# include "u_rndis.h"
cbbd14a9	37	# include "rndis.h"
f176a5d8	38	#endif
f1a1823f	39	#include "u_ether.h"
f176a5d8	40
7d16e8d3	41	USB_GADGET_COMPOSITE_OPTIONS();
279cc49a	42
f1a1823f AP	43	USB_ETHERNET_MODULE_PARAMETERS();
f1a1823f AP	44
279cc49a MN	45	/*************************** Device Descriptor **************************/
279cc49a MN	46
1c6529e9 MN	47	#define MULTI_VENDOR_NUM 0x1d6b /* Linux Foundation */
1c6529e9 MN	48	#define MULTI_PRODUCT_NUM 0x0104 /* Multifunction Composite Gadget */
279cc49a MN	49
	50
	51	enum {
	52	__MULTI_NO_CONFIG,
	53	#ifdef CONFIG_USB_G_MULTI_RNDIS
	54	MULTI_RNDIS_CONFIG_NUM,
	55	#endif
	56	#ifdef CONFIG_USB_G_MULTI_CDC
	57	MULTI_CDC_CONFIG_NUM,
	58	#endif
	59	};
	60
f176a5d8 MN	61
	62	static struct usb_device_descriptor device_desc = {
	63	.bLength = sizeof device_desc,
	64	.bDescriptorType = USB_DT_DEVICE,
	65
0aecfc1b	66	/* .bcdUSB = DYNAMIC */
f176a5d8	67
279cc49a	68	.bDeviceClass = USB_CLASS_MISC /* 0xEF */,
f176a5d8 MN	69	.bDeviceSubClass = 2,
f176a5d8 MN	70	.bDeviceProtocol = 1,
f176a5d8 MN	71
	72	/* Vendor and product id can be overridden by module parameters. */
	73	.idVendor = cpu_to_le16(MULTI_VENDOR_NUM),
	74	.idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
f176a5d8 MN	75	};
f176a5d8 MN	76
21ddc2a8	77	static const struct usb_descriptor_header *otg_desc[2];
f176a5d8	78
279cc49a	79	enum {
276e2e4f	80	MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX,
279cc49a	81	MULTI_STRING_CDC_CONFIG_IDX,
279cc49a	82	};
f176a5d8	83
f176a5d8	84	static struct usb_string strings_dev[] = {
276e2e4f	85	[USB_GADGET_MANUFACTURER_IDX].s = "",
d33f74fc	86	[USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
276e2e4f	87	[USB_GADGET_SERIAL_IDX].s = "",
279cc49a	88	[MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
279cc49a	89	[MULTI_STRING_CDC_CONFIG_IDX].s = "Multifunction with CDC ECM",
f176a5d8 MN	90	{ } /* end of list */
	91	};
	92
f176a5d8	93	static struct usb_gadget_strings *dev_strings[] = {
279cc49a MN	94	&(struct usb_gadget_strings){
	95	.language = 0x0409, /* en-us */
	96	.strings = strings_dev,
	97	},
f176a5d8 MN	98	NULL,
	99	};
	100
f176a5d8 MN	101
	102
	103
	104	/**************************** Configurations ****************************/
	105
279cc49a	106	static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
6fdc5dd2 AP	107	#ifdef CONFIG_USB_GADGET_DEBUG_FILES
	108
	109	static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
	110
	111	#else
	112
	113	/*
	114	* Number of buffers we will use.
	115	* 2 is usually enough for good buffering pipeline
	116	*/
	117	#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
	118
0c8b1992	119	#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
6fdc5dd2	120
279cc49a MN	121	FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
279cc49a MN	122
59835ad7	123	static struct usb_function_instance *fi_acm;
1bcce939	124	static struct usb_function_instance *fi_msg;
f176a5d8	125
279cc49a	126	/******** RNDIS ********/
f176a5d8	127
396cda90	128	#ifdef USB_ETH_RNDIS
4d1a8f68	129	static struct usb_function_instance *fi_rndis;
59835ad7	130	static struct usb_function *f_acm_rndis;
4d1a8f68	131	static struct usb_function *f_rndis;
1bcce939	132	static struct usb_function *f_msg_rndis;
f176a5d8	133
c94e289f	134	static int rndis_do_config(struct usb_configuration *c)
f176a5d8 MN	135	{
	136	int ret;
	137
	138	if (gadget_is_otg(c->cdev->gadget)) {
	139	c->descriptors = otg_desc;
	140	c->bmAttributes \|= USB_CONFIG_ATT_WAKEUP;
	141	}
	142
4d1a8f68 AP	143	f_rndis = usb_get_function(fi_rndis);
	144	if (IS_ERR(f_rndis))
	145	return PTR_ERR(f_rndis);
	146
	147	ret = usb_add_function(c, f_rndis);
f176a5d8	148	if (ret < 0)
4d1a8f68	149	goto err_func_rndis;
f176a5d8	150
59835ad7	151	f_acm_rndis = usb_get_function(fi_acm);
4d1a8f68 AP	152	if (IS_ERR(f_acm_rndis)) {
	153	ret = PTR_ERR(f_acm_rndis);
	154	goto err_func_acm;
	155	}
59835ad7 SAS	156
	157	ret = usb_add_function(c, f_acm_rndis);
	158	if (ret)
	159	goto err_conf;
f176a5d8	160
1bcce939 AP	161	f_msg_rndis = usb_get_function(fi_msg);
	162	if (IS_ERR(f_msg_rndis)) {
	163	ret = PTR_ERR(f_msg_rndis);
59835ad7	164	goto err_fsg;
1bcce939 AP	165	}
1bcce939 AP	166
1bcce939 AP	167	ret = usb_add_function(c, f_msg_rndis);
	168	if (ret)
	169	goto err_run;
f176a5d8 MN	170
f176a5d8 MN	171	return 0;
1bcce939 AP	172	err_run:
1bcce939 AP	173	usb_put_function(f_msg_rndis);
59835ad7 SAS	174	err_fsg:
	175	usb_remove_function(c, f_acm_rndis);
	176	err_conf:
	177	usb_put_function(f_acm_rndis);
4d1a8f68 AP	178	err_func_acm:
	179	usb_remove_function(c, f_rndis);
	180	err_func_rndis:
	181	usb_put_function(f_rndis);
59835ad7	182	return ret;
f176a5d8 MN	183	}
f176a5d8 MN	184
6fcf1129	185	static int rndis_config_register(struct usb_composite_dev *cdev)
279cc49a MN	186	{
279cc49a MN	187	static struct usb_configuration config = {
279cc49a MN	188	.bConfigurationValue = MULTI_RNDIS_CONFIG_NUM,
	189	.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
	190	};
	191
	192	config.label = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
	193	config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;
	194
c9bfff9c	195	return usb_add_config(cdev, &config, rndis_do_config);
279cc49a MN	196	}
	197
	198	#else
	199
6fcf1129	200	static int rndis_config_register(struct usb_composite_dev *cdev)
279cc49a MN	201	{
	202	return 0;
	203	}
f176a5d8 MN	204
	205	#endif
	206
279cc49a MN	207
	208	/******** CDC ECM ********/
	209
f176a5d8	210	#ifdef CONFIG_USB_G_MULTI_CDC
73889015	211	static struct usb_function_instance *fi_ecm;
59835ad7	212	static struct usb_function *f_acm_multi;
73889015	213	static struct usb_function *f_ecm;
1bcce939	214	static struct usb_function *f_msg_multi;
f176a5d8	215
c94e289f	216	static int cdc_do_config(struct usb_configuration *c)
f176a5d8 MN	217	{
	218	int ret;
	219
	220	if (gadget_is_otg(c->cdev->gadget)) {
	221	c->descriptors = otg_desc;
	222	c->bmAttributes \|= USB_CONFIG_ATT_WAKEUP;
	223	}
	224
73889015 AP	225	f_ecm = usb_get_function(fi_ecm);
	226	if (IS_ERR(f_ecm))
	227	return PTR_ERR(f_ecm);
	228
	229	ret = usb_add_function(c, f_ecm);
f176a5d8	230	if (ret < 0)
73889015	231	goto err_func_ecm;
f176a5d8	232
59835ad7 SAS	233	/* implicit port_num is zero */
59835ad7 SAS	234	f_acm_multi = usb_get_function(fi_acm);
73889015 AP	235	if (IS_ERR(f_acm_multi)) {
	236	ret = PTR_ERR(f_acm_multi);
	237	goto err_func_acm;
	238	}
59835ad7 SAS	239
	240	ret = usb_add_function(c, f_acm_multi);
	241	if (ret)
	242	goto err_conf;
f176a5d8	243
1bcce939 AP	244	f_msg_multi = usb_get_function(fi_msg);
	245	if (IS_ERR(f_msg_multi)) {
	246	ret = PTR_ERR(f_msg_multi);
59835ad7	247	goto err_fsg;
1bcce939 AP	248	}
1bcce939 AP	249
1bcce939 AP	250	ret = usb_add_function(c, f_msg_multi);
	251	if (ret)
	252	goto err_run;
f176a5d8 MN	253
f176a5d8 MN	254	return 0;
1bcce939 AP	255	err_run:
1bcce939 AP	256	usb_put_function(f_msg_multi);
59835ad7 SAS	257	err_fsg:
	258	usb_remove_function(c, f_acm_multi);
	259	err_conf:
	260	usb_put_function(f_acm_multi);
73889015 AP	261	err_func_acm:
	262	usb_remove_function(c, f_ecm);
	263	err_func_ecm:
	264	usb_put_function(f_ecm);
59835ad7	265	return ret;
f176a5d8 MN	266	}
f176a5d8 MN	267
6fcf1129	268	static int cdc_config_register(struct usb_composite_dev *cdev)
279cc49a MN	269	{
279cc49a MN	270	static struct usb_configuration config = {
279cc49a MN	271	.bConfigurationValue = MULTI_CDC_CONFIG_NUM,
	272	.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
	273	};
	274
	275	config.label = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
	276	config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;
	277
c9bfff9c	278	return usb_add_config(cdev, &config, cdc_do_config);
279cc49a MN	279	}
	280
	281	#else
	282
6fcf1129	283	static int cdc_config_register(struct usb_composite_dev *cdev)
279cc49a MN	284	{
	285	return 0;
	286	}
f176a5d8 MN	287
	288	#endif
	289
	290
	291
	292	/**************************** Gadget Bind ****************************/
	293
6fcf1129	294	static int multi_bind(struct usb_composite_dev *cdev)
f176a5d8 MN	295	{
f176a5d8 MN	296	struct usb_gadget *gadget = cdev->gadget;
73889015 AP	297	#ifdef CONFIG_USB_G_MULTI_CDC
73889015 AP	298	struct f_ecm_opts *ecm_opts;
4d1a8f68 AP	299	#endif
	300	#ifdef USB_ETH_RNDIS
	301	struct f_rndis_opts *rndis_opts;
73889015	302	#endif
1bcce939 AP	303	struct fsg_opts *fsg_opts;
1bcce939 AP	304	struct fsg_config config;
ed9cbda6	305	int status;
f176a5d8 MN	306
	307	if (!can_support_ecm(cdev->gadget)) {
	308	dev_err(&gadget->dev, "controller '%s' not usable\n",
4d1a8f68	309	gadget->name);
f176a5d8 MN	310	return -EINVAL;
	311	}
	312
73889015 AP	313	#ifdef CONFIG_USB_G_MULTI_CDC
	314	fi_ecm = usb_get_function_instance("ecm");
	315	if (IS_ERR(fi_ecm))
	316	return PTR_ERR(fi_ecm);
	317
	318	ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
	319
	320	gether_set_qmult(ecm_opts->net, qmult);
	321	if (!gether_set_host_addr(ecm_opts->net, host_addr))
	322	pr_info("using host ethernet address: %s", host_addr);
	323	if (!gether_set_dev_addr(ecm_opts->net, dev_addr))
	324	pr_info("using self ethernet address: %s", dev_addr);
4d1a8f68	325	#endif
73889015	326
4d1a8f68 AP	327	#ifdef USB_ETH_RNDIS
	328	fi_rndis = usb_get_function_instance("rndis");
	329	if (IS_ERR(fi_rndis)) {
	330	status = PTR_ERR(fi_rndis);
	331	goto fail;
	332	}
73889015	333
4d1a8f68	334	rndis_opts = container_of(fi_rndis, struct f_rndis_opts, func_inst);
73889015	335
4d1a8f68 AP	336	gether_set_qmult(rndis_opts->net, qmult);
	337	if (!gether_set_host_addr(rndis_opts->net, host_addr))
	338	pr_info("using host ethernet address: %s", host_addr);
	339	if (!gether_set_dev_addr(rndis_opts->net, dev_addr))
	340	pr_info("using self ethernet address: %s", dev_addr);
73889015 AP	341	#endif
	342
	343	#if (defined CONFIG_USB_G_MULTI_CDC && defined USB_ETH_RNDIS)
4d1a8f68 AP	344	/*
	345	* If both ecm and rndis are selected then:
	346	* 1) rndis borrows the net interface from ecm
	347	* 2) since the interface is shared it must not be bound
	348	* twice - in ecm's _and_ rndis' binds, so do it here.
	349	*/
73889015 AP	350	gether_set_gadget(ecm_opts->net, cdev->gadget);
	351	status = gether_register_netdev(ecm_opts->net);
	352	if (status)
	353	goto fail0;
73889015	354
4d1a8f68 AP	355	rndis_borrow_net(fi_rndis, ecm_opts->net);
4d1a8f68 AP	356	ecm_opts->bound = true;
73889015	357	#endif
f176a5d8 MN	358
f176a5d8 MN	359	/* set up serial link layer */
59835ad7 SAS	360	fi_acm = usb_get_function_instance("acm");
	361	if (IS_ERR(fi_acm)) {
	362	status = PTR_ERR(fi_acm);
c4ed4ac1	363	goto fail0;
59835ad7 SAS	364	}
59835ad7 SAS	365
f176a5d8	366	/* set up mass storage function */
1bcce939 AP	367	fi_msg = usb_get_function_instance("mass_storage");
	368	if (IS_ERR(fi_msg)) {
	369	status = PTR_ERR(fi_msg);
	370	goto fail1;
f176a5d8	371	}
1bcce939 AP	372	fsg_config_from_params(&config, &fsg_mod_data, fsg_num_buffers);
	373	fsg_opts = fsg_opts_from_func_inst(fi_msg);
	374
	375	fsg_opts->no_configfs = true;
	376	status = fsg_common_set_num_buffers(fsg_opts->common, fsg_num_buffers);
	377	if (status)
	378	goto fail2;
	379
1bcce939 AP	380	status = fsg_common_set_cdev(fsg_opts->common, cdev, config.can_stall);
	381	if (status)
	382	goto fail_set_cdev;
	383
	384	fsg_common_set_sysfs(fsg_opts->common, true);
	385	status = fsg_common_create_luns(fsg_opts->common, &config);
	386	if (status)
	387	goto fail_set_cdev;
	388
	389	fsg_common_set_inquiry_string(fsg_opts->common, config.vendor_name,
	390	config.product_name);
f176a5d8	391
a99d8a45	392	/* allocate string IDs */
279cc49a MN	393	status = usb_string_ids_tab(cdev, strings_dev);
279cc49a MN	394	if (unlikely(status < 0))
1bcce939	395	goto fail_string_ids;
d33f74fc	396	device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
f176a5d8	397
21ddc2a8 LJ	398	if (gadget_is_otg(gadget) && !otg_desc[0]) {
	399	struct usb_descriptor_header *usb_desc;
	400
	401	usb_desc = usb_otg_descriptor_alloc(gadget);
c021e023 JJB	402	if (!usb_desc) {
c021e023 JJB	403	status = -ENOMEM;
21ddc2a8	404	goto fail_string_ids;
c021e023	405	}
21ddc2a8 LJ	406	usb_otg_descriptor_init(gadget, usb_desc);
	407	otg_desc[0] = usb_desc;
	408	otg_desc[1] = NULL;
	409	}
	410
279cc49a MN	411	/* register configurations */
	412	status = rndis_config_register(cdev);
	413	if (unlikely(status < 0))
21ddc2a8	414	goto fail_otg_desc;
f176a5d8	415
279cc49a MN	416	status = cdc_config_register(cdev);
279cc49a MN	417	if (unlikely(status < 0))
21ddc2a8	418	goto fail_otg_desc;
7d16e8d3	419	usb_composite_overwrite_options(cdev, &coverwrite);
f176a5d8	420
279cc49a MN	421	/* we're done */
279cc49a MN	422	dev_info(&gadget->dev, DRIVER_DESC "\n");
f176a5d8 MN	423	return 0;
f176a5d8 MN	424
279cc49a MN	425
279cc49a MN	426	/* error recovery */
21ddc2a8 LJ	427	fail_otg_desc:
	428	kfree(otg_desc[0]);
	429	otg_desc[0] = NULL;
1bcce939 AP	430	fail_string_ids:
	431	fsg_common_remove_luns(fsg_opts->common);
	432	fail_set_cdev:
1bcce939	433	fsg_common_free_buffers(fsg_opts->common);
f176a5d8	434	fail2:
1bcce939	435	usb_put_function_instance(fi_msg);
f176a5d8	436	fail1:
59835ad7	437	usb_put_function_instance(fi_acm);
f176a5d8	438	fail0:
4d1a8f68 AP	439	#ifdef USB_ETH_RNDIS
	440	usb_put_function_instance(fi_rndis);
	441	fail:
	442	#endif
73889015 AP	443	#ifdef CONFIG_USB_G_MULTI_CDC
73889015 AP	444	usb_put_function_instance(fi_ecm);
73889015	445	#endif
f176a5d8 MN	446	return status;
	447	}
	448
c94e289f	449	static int multi_unbind(struct usb_composite_dev *cdev)
f176a5d8	450	{
1bcce939 AP	451	#ifdef CONFIG_USB_G_MULTI_CDC
	452	usb_put_function(f_msg_multi);
	453	#endif
	454	#ifdef USB_ETH_RNDIS
	455	usb_put_function(f_msg_rndis);
	456	#endif
	457	usb_put_function_instance(fi_msg);
59835ad7 SAS	458	#ifdef CONFIG_USB_G_MULTI_CDC
	459	usb_put_function(f_acm_multi);
	460	#endif
	461	#ifdef USB_ETH_RNDIS
	462	usb_put_function(f_acm_rndis);
	463	#endif
	464	usb_put_function_instance(fi_acm);
4d1a8f68 AP	465	#ifdef USB_ETH_RNDIS
	466	usb_put_function(f_rndis);
	467	usb_put_function_instance(fi_rndis);
	468	#endif
73889015 AP	469	#ifdef CONFIG_USB_G_MULTI_CDC
	470	usb_put_function(f_ecm);
	471	usb_put_function_instance(fi_ecm);
73889015	472	#endif
21ddc2a8 LJ	473	kfree(otg_desc[0]);
	474	otg_desc[0] = NULL;
	475
f176a5d8 MN	476	return 0;
	477	}
	478
	479
	480	/**************************** Some noise ****************************/
	481
	482
c94e289f	483	static struct usb_composite_driver multi_driver = {
f176a5d8 MN	484	.name = "g_multi",
	485	.dev = &device_desc,
	486	.strings = dev_strings,
463f67ae	487	.max_speed = USB_SPEED_SUPER,
03e42bd5	488	.bind = multi_bind,
c94e289f	489	.unbind = multi_unbind,
a99d8a45	490	.needs_serial = 1,
f176a5d8 MN	491	};
f176a5d8 MN	492
909346a8	493	module_usb_composite_driver(multi_driver);