ARMはUSBスレーブデバイスとしての実装

9570 ワード

ARMはUSBスレーブデバイスの実装としてlinuxカーネルにルーチンがあり、残念ながらそのまま持って来ることはできない.主に2つの原因があります:1、カーネルにヘッダファイルが1つ欠けています.include/linux/usb/g_hid.h時間が長すぎて、よく覚えていません.この書類のようです.ネット上のダウンを降りたら、カーネルヘッダファイルに投げればいい.内容は次のとおりです.
/*
 * g_hid.h -- Header file for USB HID gadget driver
 *
 * Copyright (C) 2010 Fabien Chouteau 
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __LINUX_USB_G_HID_H
#define __LINUX_USB_G_HID_H

struct hidg_func_descriptor {
        unsigned char           subclass;
        unsigned char           protocol;
        unsigned short          report_length;
        unsigned short          report_desc_length;
        unsigned char           report_desc[];
};
#endif /* __LINUX_USB_G_HID_H */
、linux-2.6.31.1-cavm 1/drivers/usb/gadget、hid.c書類の書き方に誤りがある.
正しくは次のように書かれています.
/*
 * hid.c -- HID Composite driver
 *
 * Based on multi.c
 *
 * Copyright (C) 2010 Fabien Chouteau 
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#include 
#include 
#include 
#include 


#define DRIVER_DESC		"HID ps3 controller"
#define DRIVER_VERSION		"2011/07/21"

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

#define HIDG_VENDOR_NUM		0x0525	/* XXX NetChip */
#define HIDG_PRODUCT_NUM	0xa4ac	/* Linux-USB HID gadget */

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

/*
 * 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 "f_hid.c"


struct hidg_func_node {
	struct list_head node;
	struct hidg_func_descriptor *func;
};

static LIST_HEAD(hidg_func_list);

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

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, */
	.bDeviceClass =		0xEF,
	.bDeviceSubClass =	2,
	.bDeviceProtocol =	1,
	/* .bMaxPacketSize0 = f(hardware) */

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



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

static int __init do_config(struct usb_configuration *c)
{
	struct hidg_func_node *e;
	int func = 0, status = 0;

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

	list_for_each_entry(e, &hidg_func_list, node) {
		status = hidg_bind_config(c, e->func, func++);
		if (status)
			break;
	}

	return status;
}

static struct usb_configuration config_driver = {
	.label			= "HID Gadget",
	.bind			= do_config,
	.bConfigurationValue	= 1,
	/* .iConfiguration = DYNAMIC */
	.bmAttributes		= USB_CONFIG_ATT_SELFPOWER,
};

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

static int __init hid_bind(struct usb_composite_dev *cdev)
{
	struct usb_gadget *gadget = cdev->gadget;
	struct list_head *tmp;
	int status, gcnum, funcs = 0;

	list_for_each(tmp, &hidg_func_list)
		funcs++;

	if (!funcs)
		return -ENODEV;

	/* set up HID */
	printk("=============bind
"); status = ghid_setup(cdev->gadget, funcs); if (status < 0) return status; gcnum = usb_gadget_controller_number(gadget); if (gcnum >= 0) device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum); else 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) return status; strings_dev[STRING_MANUFACTURER_IDX].id = status; device_desc.iManufacturer = status; status = usb_string_id(cdev); if (status < 0) return status; strings_dev[STRING_PRODUCT_IDX].id = status; device_desc.iProduct = status; /* register our configuration */ status = usb_add_config(cdev, &config_driver); if (status < 0) return status; dev_info(&gadget->dev, DRIVER_DESC ", version: " DRIVER_VERSION "
"); return 0; } static int __exit hid_unbind(struct usb_composite_dev *cdev) { ghid_cleanup(); return 0; } static int __init hidg_plat_driver_probe(struct platform_device *pdev) { struct hidg_func_descriptor *func = pdev->dev.platform_data; struct hidg_func_node *entry; if (!func) { dev_err(&pdev->dev, "Platform data missing
"); return -ENODEV; } entry = kzalloc(sizeof(*entry), GFP_KERNEL); if (!entry) return -ENOMEM; entry->func = func; list_add_tail(&entry->node, &hidg_func_list); return 0; } static int __devexit hidg_plat_driver_remove(struct platform_device *pdev) { struct hidg_func_node *e, *n; list_for_each_entry_safe(e, n, &hidg_func_list, node) { list_del(&e->node); kfree(e); } return 0; } /****************************** Some noise ******************************/ static struct usb_composite_driver hidg_driver = { .name = "g_hid", .dev = &device_desc, .strings = dev_strings, .bind = hid_bind, .unbind = __exit_p(hid_unbind), }; static struct platform_driver hidg_plat_driver = { .remove = __devexit_p(hidg_plat_driver_remove), .driver = { .name = "hidg", .owner = THIS_MODULE, }, }; static struct musb_hdrc_platform_data hidg_plat_data = { .mode = MUSB_PERIPHERAL,//MUSB_OTG, }; static struct platform_device hidg_plat_device = { .name = "hidg", .id = -1, .dev = { //.init_name = "hidg_init" .platform_data = &hidg_plat_data, }, }; MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR("Fabien Chouteau, Peter Korsgaard"); MODULE_LICENSE("GPL"); static int __init hidg_init(void) { int status; status = platform_device_register(&hidg_plat_device); if(status < 0) return status; status = platform_driver_probe(&hidg_plat_driver, hidg_plat_driver_probe); if (status < 0) return status; status = usb_composite_register(&hidg_driver); if (status < 0) platform_driver_unregister(&hidg_plat_driver); return status; } module_init(hidg_init); static void __exit hidg_cleanup(void) { platform_driver_unregister(&hidg_plat_driver); usb_composite_unregister(&hidg_driver); } module_exit(hidg_cleanup);