[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / gadget / cdc2.c

/*
 * cdc2.c -- CDC Composite driver, with ECM and ACM support
 *
 * Copyright (C) 2008 David Brownell
 * Copyright (C) 2008 Nokia Corporation
 *
 * 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/utsname.h>

#include "u_ether.h"
#include "u_serial.h"


#define DRIVER_DESC		"CDC Composite Gadget"
#define DRIVER_VERSION		"King Kamehameha Day 2008"

/*-------------------------------------------------------------------------*/

/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!!  Ever!!
 * Instead:  allocate your own, using normal USB-IF procedures.
 */

/* Thanks to NetChip Technologies for donating this product ID.
 * It's for devices with only this composite CDC configuration.
 */
#define CDC_VENDOR_NUM		0x0525	/* NetChip */
#define CDC_PRODUCT_NUM		0xa4aa	/* CDC Composite: ECM + ACM */

/*-------------------------------------------------------------------------*/

/*
 * 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"
#include "u_serial.c"
#include "f_acm.c"
#include "f_ecm.c"
#include "u_ether.c"

/*-------------------------------------------------------------------------*/

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

	.bcdUSB =		cpu_to_le16(0x0200),

	.bDeviceClass =		USB_CLASS_COMM,
	.bDeviceSubClass =	0,
	.bDeviceProtocol =	0,
	/* .bMaxPacketSize0 = f(hardware) */

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

static struct usb_otg_descriptor otg_descriptor = {
	.bLength =		sizeof 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,
};

static const struct usb_descriptor_header *otg_desc[] = {
	(struct usb_descriptor_header *) &otg_descriptor,
	NULL,
};


/* string IDs are assigned dynamically */

#define STRING_MANUFACTURER_IDX		0
#define STRING_PRODUCT_IDX		1

static char manufacturer[50];

static struct usb_string strings_dev[] = {
	[STRING_MANUFACTURER_IDX].s = manufacturer,
	[STRING_PRODUCT_IDX].s = DRIVER_DESC,
	{  } /* end of list */
};

static struct usb_gadget_strings stringtab_dev = {
	.language	= 0x0409,	/* en-us */
	.strings	= strings_dev,
};

static struct usb_gadget_strings *dev_strings[] = {
	&stringtab_dev,
	NULL,
};

static u8 hostaddr[ETH_ALEN];

/*-------------------------------------------------------------------------*/

/*
 * We _always_ have both CDC ECM and CDC ACM functions.
 */
static int __init cdc_do_config(struct usb_configuration *c)
{
	int	status;

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

	status = ecm_bind_config(c, hostaddr);
	if (status < 0)
		return status;

	status = acm_bind_config(c, 0);
	if (status < 0)
		return status;

	return 0;
}

static struct usb_configuration cdc_config_driver = {
	.label			= "CDC Composite (ECM + ACM)",
	.bConfigurationValue	= 1,
	/* .iConfiguration = DYNAMIC */
	.bmAttributes		= USB_CONFIG_ATT_SELFPOWER,
};

/*-------------------------------------------------------------------------*/

static int __init cdc_bind(struct usb_composite_dev *cdev)
{
	int			gcnum;
	struct usb_gadget	*gadget = cdev->gadget;
	int			status;

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

	/* set up network link layer */
	status = gether_setup(cdev->gadget, hostaddr);
	if (status < 0)
		return status;

	/* set up serial link layer */
	status = gserial_setup(cdev->gadget, 1);
	if (status < 0)
		goto fail0;

	gcnum = usb_gadget_controller_number(gadget);
	if (gcnum >= 0)
		device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);
	else {
		/* We assume that can_support_ecm() tells the truth;
		 * but if the controller isn't recognized at all then
		 * that assumption is a bit more likely to be wrong.
		 */
		WARNING(cdev, "controller '%s' not recognized; trying %s\n",
				gadget->name,
				cdc_config_driver.label);
		device_desc.bcdDevice =
			cpu_to_le16(0x0300 | 0x0099);
	}


	/* Allocate string descriptor numbers ... note that string
	 * contents can be overridden by the composite_dev glue.
	 */

	/* device descriptor strings: manufacturer, product */
	snprintf(manufacturer, sizeof manufacturer, "%s %s with %s",
		init_utsname()->sysname, init_utsname()->release,
		gadget->name);
	status = usb_string_id(cdev);
	if (status < 0)
		goto fail1;
	strings_dev[STRING_MANUFACTURER_IDX].id = status;
	device_desc.iManufacturer = status;

	status = usb_string_id(cdev);
	if (status < 0)
		goto fail1;
	strings_dev[STRING_PRODUCT_IDX].id = status;
	device_desc.iProduct = status;

	/* register our configuration */
	status = usb_add_config(cdev, &cdc_config_driver, cdc_do_config);
	if (status < 0)
		goto fail1;

	dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
			DRIVER_DESC);

	return 0;

fail1:
	gserial_cleanup();
fail0:
	gether_cleanup();
	return status;
}

static int __exit cdc_unbind(struct usb_composite_dev *cdev)
{
	gserial_cleanup();
	gether_cleanup();
	return 0;
}

static struct usb_composite_driver cdc_driver = {
	.name		= "g_cdc",
	.dev		= &device_desc,
	.strings	= dev_strings,
	.max_speed	= USB_SPEED_HIGH,
	.unbind		= __exit_p(cdc_unbind),
};

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("David Brownell");
MODULE_LICENSE("GPL");

static int __init init(void)
{
	return usb_composite_probe(&cdc_driver, cdc_bind);
}
module_init(init);

static void __exit cleanup(void)
{
	usb_composite_unregister(&cdc_driver);
}
module_exit(cleanup);
Commit	Line	Data
19e20680 DB	1	/*
	2	* cdc2.c -- CDC Composite driver, with ECM and ACM support
	3	*
	4	* Copyright (C) 2008 David Brownell
	5	* Copyright (C) 2008 Nokia Corporation
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
19e20680 DB	11	*/
	12
	13	#include <linux/kernel.h>
	14	#include <linux/utsname.h>
	15
	16	#include "u_ether.h"
	17	#include "u_serial.h"
	18
	19
	20	#define DRIVER_DESC "CDC Composite Gadget"
	21	#define DRIVER_VERSION "King Kamehameha Day 2008"
	22
	23	/-------------------------------------------------------------------------/
	24
	25	/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
	26	* Instead: allocate your own, using normal USB-IF procedures.
	27	*/
	28
	29	/* Thanks to NetChip Technologies for donating this product ID.
	30	* It's for devices with only this composite CDC configuration.
	31	*/
	32	#define CDC_VENDOR_NUM 0x0525 /* NetChip */
	33	#define CDC_PRODUCT_NUM 0xa4aa /* CDC Composite: ECM + ACM */
	34
	35	/-------------------------------------------------------------------------/
	36
8a1ce2c0 DB	37	/*
	38	* Kbuild is not very cooperative with respect to linking separately
	39	* compiled library objects into one module. So for now we won't use
	40	* separate compilation ... ensuring init/exit sections work to shrink
	41	* the runtime footprint, and giving us at least some parts of what
	42	* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
	43	*/
	44
	45	#include "composite.c"
	46	#include "usbstring.c"
	47	#include "config.c"
	48	#include "epautoconf.c"
	49	#include "u_serial.c"
	50	#include "f_acm.c"
	51	#include "f_ecm.c"
	52	#include "u_ether.c"
	53
	54	/-------------------------------------------------------------------------/
	55
19e20680 DB	56	static struct usb_device_descriptor device_desc = {
	57	.bLength = sizeof device_desc,
	58	.bDescriptorType = USB_DT_DEVICE,
	59
551509d2	60	.bcdUSB = cpu_to_le16(0x0200),
19e20680 DB	61
	62	.bDeviceClass = USB_CLASS_COMM,
	63	.bDeviceSubClass = 0,
	64	.bDeviceProtocol = 0,
	65	/* .bMaxPacketSize0 = f(hardware) */
	66
	67	/* Vendor and product id can be overridden by module parameters. */
551509d2 HH	68	.idVendor = cpu_to_le16(CDC_VENDOR_NUM),
551509d2 HH	69	.idProduct = cpu_to_le16(CDC_PRODUCT_NUM),
19e20680 DB	70	/* .bcdDevice = f(hardware) */
	71	/* .iManufacturer = DYNAMIC */
	72	/* .iProduct = DYNAMIC */
	73	/* NO SERIAL NUMBER */
	74	.bNumConfigurations = 1,
	75	};
	76
	77	static struct usb_otg_descriptor otg_descriptor = {
	78	.bLength = sizeof otg_descriptor,
	79	.bDescriptorType = USB_DT_OTG,
	80
	81	/* REVISIT SRP-only hardware is possible, although
	82	* it would not be called "OTG" ...
	83	*/
	84	.bmAttributes = USB_OTG_SRP \| USB_OTG_HNP,
	85	};
	86
	87	static const struct usb_descriptor_header *otg_desc[] = {
	88	(struct usb_descriptor_header *) &otg_descriptor,
	89	NULL,
	90	};
	91
	92
	93	/* string IDs are assigned dynamically */
	94
	95	#define STRING_MANUFACTURER_IDX 0
	96	#define STRING_PRODUCT_IDX 1
	97
	98	static char manufacturer[50];
	99
	100	static struct usb_string strings_dev[] = {
	101	[STRING_MANUFACTURER_IDX].s = manufacturer,
	102	[STRING_PRODUCT_IDX].s = DRIVER_DESC,
	103	{ } /* end of list */
	104	};
	105
	106	static struct usb_gadget_strings stringtab_dev = {
	107	.language = 0x0409, /* en-us */
	108	.strings = strings_dev,
	109	};
	110
	111	static struct usb_gadget_strings *dev_strings[] = {
	112	&stringtab_dev,
	113	NULL,
	114	};
	115
	116	static u8 hostaddr[ETH_ALEN];
	117
	118	/-------------------------------------------------------------------------/
	119
	120	/*
	121	* We _always_ have both CDC ECM and CDC ACM functions.
	122	*/
e12995ec	123	static int __init cdc_do_config(struct usb_configuration *c)
19e20680 DB	124	{
	125	int status;
	126
	127	if (gadget_is_otg(c->cdev->gadget)) {
	128	c->descriptors = otg_desc;
	129	c->bmAttributes \|= USB_CONFIG_ATT_WAKEUP;
	130	}
	131
	132	status = ecm_bind_config(c, hostaddr);
	133	if (status < 0)
	134	return status;
	135
	136	status = acm_bind_config(c, 0);
ac90e365	137	if (status < 0)
19e20680 DB	138	return status;
	139
	140	return 0;
	141	}
	142
	143	static struct usb_configuration cdc_config_driver = {
	144	.label = "CDC Composite (ECM + ACM)",
19e20680 DB	145	.bConfigurationValue = 1,
	146	/* .iConfiguration = DYNAMIC */
	147	.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
19e20680 DB	148	};
	149
	150	/-------------------------------------------------------------------------/
	151
e12995ec	152	static int __init cdc_bind(struct usb_composite_dev *cdev)
19e20680 DB	153	{
	154	int gcnum;
	155	struct usb_gadget *gadget = cdev->gadget;
	156	int status;
	157
	158	if (!can_support_ecm(cdev->gadget)) {
8a1ce2c0 DB	159	dev_err(&gadget->dev, "controller '%s' not usable\n",
8a1ce2c0 DB	160	gadget->name);
19e20680 DB	161	return -EINVAL;
	162	}
	163
	164	/* set up network link layer */
	165	status = gether_setup(cdev->gadget, hostaddr);
	166	if (status < 0)
	167	return status;
	168
	169	/* set up serial link layer */
	170	status = gserial_setup(cdev->gadget, 1);
	171	if (status < 0)
	172	goto fail0;
	173
	174	gcnum = usb_gadget_controller_number(gadget);
	175	if (gcnum >= 0)
	176	device_desc.bcdDevice = cpu_to_le16(0x0300 \| gcnum);
	177	else {
	178	/* We assume that can_support_ecm() tells the truth;
	179	* but if the controller isn't recognized at all then
	180	* that assumption is a bit more likely to be wrong.
	181	*/
b6c63937	182	WARNING(cdev, "controller '%s' not recognized; trying %s\n",
19e20680 DB	183	gadget->name,
	184	cdc_config_driver.label);
	185	device_desc.bcdDevice =
551509d2	186	cpu_to_le16(0x0300 \| 0x0099);
19e20680 DB	187	}
	188
	189
	190	/* Allocate string descriptor numbers ... note that string
	191	* contents can be overridden by the composite_dev glue.
	192	*/
	193
	194	/* device descriptor strings: manufacturer, product */
	195	snprintf(manufacturer, sizeof manufacturer, "%s %s with %s",
	196	init_utsname()->sysname, init_utsname()->release,
	197	gadget->name);
	198	status = usb_string_id(cdev);
	199	if (status < 0)
	200	goto fail1;
	201	strings_dev[STRING_MANUFACTURER_IDX].id = status;
	202	device_desc.iManufacturer = status;
	203
	204	status = usb_string_id(cdev);
	205	if (status < 0)
	206	goto fail1;
	207	strings_dev[STRING_PRODUCT_IDX].id = status;
	208	device_desc.iProduct = status;
	209
	210	/* register our configuration */
c9bfff9c	211	status = usb_add_config(cdev, &cdc_config_driver, cdc_do_config);
19e20680 DB	212	if (status < 0)
	213	goto fail1;
	214
8a1ce2c0 DB	215	dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
8a1ce2c0 DB	216	DRIVER_DESC);
19e20680 DB	217
	218	return 0;
	219
	220	fail1:
	221	gserial_cleanup();
	222	fail0:
	223	gether_cleanup();
	224	return status;
	225	}
	226
	227	static int __exit cdc_unbind(struct usb_composite_dev *cdev)
	228	{
	229	gserial_cleanup();
	230	gether_cleanup();
	231	return 0;
	232	}
	233
	234	static struct usb_composite_driver cdc_driver = {
	235	.name = "g_cdc",
	236	.dev = &device_desc,
	237	.strings = dev_strings,
35a0e0bf	238	.max_speed = USB_SPEED_HIGH,
19e20680 DB	239	.unbind = __exit_p(cdc_unbind),
	240	};
	241
	242	MODULE_DESCRIPTION(DRIVER_DESC);
	243	MODULE_AUTHOR("David Brownell");
	244	MODULE_LICENSE("GPL");
	245
	246	static int __init init(void)
	247	{
07a18bd7	248	return usb_composite_probe(&cdc_driver, cdc_bind);
19e20680 DB	249	}
	250	module_init(init);
	251
	252	static void __exit cleanup(void)
	253	{
	254	usb_composite_unregister(&cdc_driver);
	255	}
	256	module_exit(cleanup);