mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Michal Nazarewicz](/assets/img/avatar_default.png)
In may gadgets bind and bind like functions were in a init section as they were only run during initialisation. However, being callback functions they were referenced from structures in “normal” sections. Changing the tag from “__init” to “__ref” fixes the warnings. Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
252 lines
6.8 KiB
C
252 lines
6.8 KiB
C
/*
|
|
* mass_storage.c -- Mass Storage USB Gadget
|
|
*
|
|
* Copyright (C) 2003-2008 Alan Stern
|
|
* Copyright (C) 2009 Samsung Electronics
|
|
* Author: Michal Nazarewicz <m.nazarewicz@samsung.com>
|
|
* All rights reserved.
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
|
|
/*
|
|
* The Mass Storage Gadget acts as a USB Mass Storage device,
|
|
* appearing to the host as a disk drive or as a CD-ROM drive. In
|
|
* addition to providing an example of a genuinely useful gadget
|
|
* driver for a USB device, it also illustrates a technique of
|
|
* double-buffering for increased throughput. Last but not least, it
|
|
* gives an easy way to probe the behavior of the Mass Storage drivers
|
|
* in a USB host.
|
|
*
|
|
* Since this file serves only administrative purposes and all the
|
|
* business logic is implemented in f_mass_storage.* file. Read
|
|
* comments in this file for more detailed description.
|
|
*/
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/usb/ch9.h>
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#define DRIVER_DESC "Mass Storage Gadget"
|
|
#define DRIVER_VERSION "2009/09/11"
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* 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_mass_storage.c"
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static struct usb_device_descriptor msg_device_desc = {
|
|
.bLength = sizeof msg_device_desc,
|
|
.bDescriptorType = USB_DT_DEVICE,
|
|
|
|
.bcdUSB = cpu_to_le16(0x0200),
|
|
.bDeviceClass = USB_CLASS_PER_INTERFACE,
|
|
|
|
/* Vendor and product id can be overridden by module parameters. */
|
|
.idVendor = cpu_to_le16(FSG_VENDOR_ID),
|
|
.idProduct = cpu_to_le16(FSG_PRODUCT_ID),
|
|
/* .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
|
|
#define STRING_CONFIGURATION_IDX 2
|
|
|
|
static char manufacturer[50];
|
|
|
|
static struct usb_string strings_dev[] = {
|
|
[STRING_MANUFACTURER_IDX].s = manufacturer,
|
|
[STRING_PRODUCT_IDX].s = DRIVER_DESC,
|
|
[STRING_CONFIGURATION_IDX].s = "Self Powered",
|
|
{ } /* 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 struct fsg_module_parameters mod_data = {
|
|
.stall = 1
|
|
};
|
|
FSG_MODULE_PARAMETERS(/* no prefix */, mod_data);
|
|
|
|
static unsigned long msg_registered = 0;
|
|
static void msg_cleanup(void);
|
|
|
|
static int msg_thread_exits(struct fsg_common *common)
|
|
{
|
|
msg_cleanup();
|
|
return 0;
|
|
}
|
|
|
|
static int __ref msg_do_config(struct usb_configuration *c)
|
|
{
|
|
static const struct fsg_operations ops = {
|
|
.thread_exits = msg_thread_exits,
|
|
};
|
|
static struct fsg_common common;
|
|
|
|
struct fsg_common *retp;
|
|
struct fsg_config config;
|
|
int ret;
|
|
|
|
if (gadget_is_otg(c->cdev->gadget)) {
|
|
c->descriptors = otg_desc;
|
|
c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
|
|
}
|
|
|
|
fsg_config_from_params(&config, &mod_data);
|
|
config.ops = &ops;
|
|
|
|
retp = fsg_common_init(&common, c->cdev, &config);
|
|
if (IS_ERR(retp))
|
|
return PTR_ERR(retp);
|
|
|
|
ret = fsg_bind_config(c->cdev, c, &common);
|
|
fsg_common_put(&common);
|
|
return ret;
|
|
}
|
|
|
|
static struct usb_configuration msg_config_driver = {
|
|
.label = "Linux File-Backed Storage",
|
|
.bind = msg_do_config,
|
|
.bConfigurationValue = 1,
|
|
/* .iConfiguration = DYNAMIC */
|
|
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
|
|
};
|
|
|
|
|
|
|
|
/****************************** Gadget Bind ******************************/
|
|
|
|
|
|
static int __ref msg_bind(struct usb_composite_dev *cdev)
|
|
{
|
|
struct usb_gadget *gadget = cdev->gadget;
|
|
int status;
|
|
|
|
/* 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;
|
|
msg_device_desc.iManufacturer = status;
|
|
|
|
status = usb_string_id(cdev);
|
|
if (status < 0)
|
|
return status;
|
|
strings_dev[STRING_PRODUCT_IDX].id = status;
|
|
msg_device_desc.iProduct = status;
|
|
|
|
status = usb_string_id(cdev);
|
|
if (status < 0)
|
|
return status;
|
|
strings_dev[STRING_CONFIGURATION_IDX].id = status;
|
|
msg_config_driver.iConfiguration = status;
|
|
|
|
/* register our second configuration */
|
|
status = usb_add_config(cdev, &msg_config_driver);
|
|
if (status < 0)
|
|
return status;
|
|
|
|
dev_info(&gadget->dev, DRIVER_DESC ", version: " DRIVER_VERSION "\n");
|
|
set_bit(0, &msg_registered);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/****************************** Some noise ******************************/
|
|
|
|
|
|
static struct usb_composite_driver msg_driver = {
|
|
.name = "g_mass_storage",
|
|
.dev = &msg_device_desc,
|
|
.strings = dev_strings,
|
|
.bind = msg_bind,
|
|
};
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_AUTHOR("Michal Nazarewicz");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int __init msg_init(void)
|
|
{
|
|
return usb_composite_register(&msg_driver);
|
|
}
|
|
module_init(msg_init);
|
|
|
|
static void msg_cleanup(void)
|
|
{
|
|
if (test_and_clear_bit(0, &msg_registered))
|
|
usb_composite_unregister(&msg_driver);
|
|
}
|
|
module_exit(msg_cleanup);
|